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June, 30 2025

AI, AFR, and 1L – oh my!

From Acronyms to Action at IEEE-IAS/PCA Cement Conference 2025 By Molly Pace, Cement Economics & Implementation Engineer at Imubit If there’s one thing the Cement Industry doesn’t lack, it’s acronyms and challenges. Each year, the IEEE-PCA (now ACA) Cement Conference highlights the latest technological innovations while also surfacing persistent industry frustrations. This year’s event was no exception, there were three abbreviations that dominated hallway conversations at this year’s IEEE‑IAS/PCA (now ACA) Cement Industry Conference. With more than 1,200 delegates and 450 companies on‑site, the gathering showcased an industry eager to modernize, yet honest about the practical obstacles that still stand between ambition and execution. From Artificial Intelligence (AI) to Alternative Fuels (AFR), and the ongoing shift to Portland Limestone Cement (1L), the conference floor buzzed with new tools, strategies, and solutions. But alongside came a familiar undertone of operational struggle. Despite the abundance of cutting-edge displays, many attendees voiced continued frustration with the pace of progress in plant modernization and the road toward 1L adoption across North America. Here are the key takeaways: The Road to Net Zero is a Complex Network of Parallel Paths The cement industry has a lofty goal of net zero by 2050 which is no easy feat. The sector’s commitment to carbon neutrality framed nearly every session. Producers recognize that incremental tweaks will not close the emissions gap quickly enough. Speakers argued for integrated programmes that link kiln upgrades, alternative fuels, and data‑driven optimization into one investment narrative that finance teams can support. AFR Will Help, Once We Acknowledge and Accept the Realities Alternative fuel and raw material (AFR) adoption is advancing in the cement industry, but plant managers outlined a familiar set of internal and external hurdles: Current equipment constraints and CAPEX allocation for feeding-system retrofits Competition with landfills, which offer the cheaper disposal route without incentives Ever evolving legislation that varies by state, province, or country Variable feedstock quality and concerns about long-term fuel availability Process control complexity that threatens product consistency Consensus amongst event attendees was that solving these hurdles will involve blending a mix of technology solutions with cross-functional governance. Companies will need to align teams around a single shared view of emissions and economics that links procurement, environmental, and site operations. Portland Limestone Cement (1L): Logistics Over Chemistry The transition toward Portland Limestone Cement (PLC or 1L) continues to gain momentum, having proven a >10 % carbon‑intensity reduction. Technical debates about strength development are waning, but they’ve opened the floor for discussion on the next hurdle: logistics. Fine limestone sourcing, silo space, and market acceptance are challenges all producers are facing. Speakers advocated for coordinated rollouts that synchronize production, distribution, and specification updates. AI Has Evolved: From Predictive Maintenance to Closed Loop Optimization Artificial intelligence is more than just a buzzword, it’s already hard at work in cement plants through predictive maintenance systems. These AI-driven tools analyze sensor data, equipment performance trends, and historical failure patterns to forecast when parts will need replacing and where costly breakdowns might occur. This proactive approach has become essential for improving plant availability, reducing downtime, and optimizing maintenance budgets. But what if there was a way to shift the focus from simply understanding when things will fail to truly understanding all interactions of variables in your specific process? Once you understand all of these complex, dynamic, and nonlinear variable relationships, the realm of possibility for how you can leverage your data broadens. Culture, Capital, and Continuity Remain Key Organizational Challenges Presenters returned to a recurring theme: the cement industry’s challenges are as much organizational as technological. Winning budget for decarbonization requires a narrative that aligns cost savings with sustainability benefits, while talent pipelines must cultivate “translator” roles that bridge process engineering and data science. In a sector where kiln uptime is paramount, change initiatives succeed only when they enhance—rather than disrupt—stable production. An Action Plan Powered by Technology, Process, and Your People The road to 2050 will be achievable with the right discipline and investments in smarter fuels, smarter data, and smarter collaboration. Imubit’s approach to Closed Loop AI Optimization (AIO) starts with the real plant data—from all operating modes, all feedstocks, all AFR substitutions. It pushes towards your defined objectives, whether you’re looking at margin or emissions. And it brings members from historically siloed teams together around a single model of plant reality. Imubit’s Optimizing Brain™ Platform reveals what operators are unable to see. The chart below highlights how our models can detect and learn complex, nonlinear relationships between variables, for example calciner inlet temperature and alternative fuel rate. It can recognize subtle shifts in operational data that would otherwise go unnoticed or unmeasurable. Figure 1. Imubit gain histograms highlight nonlinear process variable relationships indicating a flip from a negative gain (red) to a positive gain (blue). This is particularly valuable in the context of AFR, where the interplay of combustion and material variability is difficult to quantify. By training on plant data, our models don’t replicate what we already know, it uncovers what we don’t. When you’re ready to see how AI can be leveraged to help push your unit to the highest economic state while balancing your 2050 emissions objectives, our team is ready to engage with your complimentary AIO Assessment.
Blog
June, 26 2025

Closed-Loop AI and Process Control: Why This Public Debate Matters

By Dennis Rohe, Business Consulting Team Lead at Imubit I recently had the opportunity to discuss closed-loop AI technology in process control with Mark Venables for an article in Connected Technology Solutions. That piece – titled “Can closed-loop AI truly deliver on its promise to revolutionise process control?” – explores the bold promises of this technology and doesn’t shy away from the tough questions. I’m thrilled to see this debate happening out in the open. For those of us passionate about industrial AI, having a public forum to weigh the potential against the challenges is incredibly exciting. It means the conversation is no longer limited to conference rooms or pilot projects; it’s reaching the wider community, inviting more voices and scrutiny. In the article, I outlined how Imubit’s approach differs from traditional process control methods, and the discussion touched on everything from real-world results to concerns about scalability and trust. The very fact that an industry publication is asking “does it truly deliver?” signals that closed-loop AI has entered the mainstream discourse. This kind of transparent dialogue is exactly what our field needs to turn hype into lasting progress. Let’s look at why this conversation matters, and why now is the perfect time to have it. Why the Debate Over Closed-Loop AI Matters The article brings up the right questions at the right time. For those of us working at the intersection of AI and heavy industry, this moment signals that closed-loop AI is no longer just a niche innovation – it’s entering serious, cross-functional discussions. From early wins like Marathon Petroleum’s system-wide optimization gains, to the formal recognition by groups like ARC, to thoughtful concerns around trust and scalability – these conversations reflect real traction and real scrutiny. The technology is maturing. And more importantly, the dialogue around it is maturing too. That’s why this debate matters. It pushes us to evolve how we think about plant operations, optimization, and decision-making in the era of AI, not in theory, but in practice, and with real input from every side of the industry. It’s not just about validating the tech – it’s about evolving how we think about plant operations, optimization, and decision-making in the era of AI. For those coming from traditional process control, these conversations may bring a mix of curiosity and caution. You might be wondering: where does this sit relative to DCS, APC, or MPC? Closed-loop AI doesn’t replace those layers, it builds on them. Think of it as an adaptive layer that learns from plant behavior and optimizes dynamically, much like a highly experienced operator who never tires. And yes, if you’re thinking, “we’ve heard big promises before,” that’s fair. But what makes this moment different is the combination of real-world results, transparent discussion, and growing industry consensus. That’s why now is the right time to pay attention. Confronting the tough questions: What makes this moment exciting is that we’re not shying away from the big questions, we’re leaning into them. The article surfaces important topics like scalability, transparency, and long-term reliability, not as roadblocks, but as opportunities for shared insight and forward movement. In the interview, I emphasized the need to demystify AI and work alongside process engineers to ensure solutions are grounded and trusted. Concerns like data quality or model drift are not setbacks, they’re invitations to build better systems together. Closed-loop AI sits at the heart of a broader evolution in process control. It’s more than a new technology, it’s a shift in how we think about complexity, collaboration, and value creation. That’s why open dialogue is so powerful. By sharing what’s working, raising what’s unclear, and learning from each other, we gain the momentum to shape a more intelligent, adaptive, and scalable future for this industry. Join the Conversation The excitement around closed-loop AI isn’t just about the technology itself, but about the people driving it forward. I want to invite others in the industrial AI and process control community to join this conversation. Whether you’ve seen results, faced challenges, or are still forming an opinion, your experience matters. Your voice is part of this transformation. Let’s challenge ideas, share what works, and move the conversation forward. This public dialogue marks a pivotal moment – it means the industry is collectively deciding how we evolve process optimization and control in the age of AI. I’m optimistic and forward-looking about where this can lead. Yes, there’s hype, but there’s also genuine progress and a growing track record we can learn from. By engaging openly now, we can shape that progress thoughtfully. So let’s keep the debate alive. Let’s continue asking the hard questions and celebrating the wins. Closed-loop AI can transform process control, but only if we as a community steer that transformation together. I’m excited to be part of this journey, and I can’t wait to hear your experiences and perspectives as we push this field forward. For those interested in the original article that sparked this discussion, check out Mark Venables’ piece in Connected Technology Solutions. It’s encouraging to see such conversations reaching a wider audience – and it’s up to all of us to keep them going.
Blog
June, 05 2025

Controllable AI: What It Really Means for the Future of Plant Modeling

The process industry companies who get most out of technology investment won’t be those who chase the buzzword of the week, but rather those who put AI technology to work where it counts, improving margins, reliability, and control. Imubit CEO Gil Cohen spent some time unpacking this in Control Global magazine—exploring the role of Controllable AI, reinforcement learning, and even GenAI in industrial plant modeling. It’s time to shift the narrative from possibility to real, plant-specific solutions. To do so, operating companies are embracing AI that’s transparent, aligned with economics, and adaptable to site-specific complexity. Why Controllable AI Matters Now Considerations for process teams as AI becomes part of daily operations. 1. Trust > Black Boxes Engineers don’t just accept black box models, they want to tinker and understand why decisions are made. Controllable AI is about giving users visibility into how decisions are made, and the ability to adjust them with confidence. 2. First Principles Still Matter The best AI doesn’t ignore your years of engineering experience, it builds on it. Combining plant data, reinforcement learning, and your employees domain knowledge creates a system that’s both smart and grounded in reality. 3. Plant-Wide Optimization Is Becoming Practical New AI architectures make it possible to stitch together unit models into plant-wide frameworks. This is resulting in better coordination across teams and fewer tradeoffs between throughput, energy, and margin. 4. GenAI Can Help… But Only If It’s Grounded in Plant Context Large Language Models (LLMs) aren’t plug-and-play for process operations. But when tailored to plant data and embedded in decision workflows, they can reduce onboarding time, improve troubleshooting, and level up team capabilities. 5. It’s All About Empowering Your Experts This next wave of industrial AI isn’t automating people out of the loop. Instead, it’s putting them at the center of it, with better tools to make faster, smarter decisions. Read the Control Global article: The next decade of industrial process modeling.
Blog
May, 30 2025

Imubit Transcend EU: Real Conversations with Refining Leaders

By Gil Cohen, CEO of Imubit Earlier this month, Imubit brought together over 40 refining professionals from 13 companies across 6 countries for two energizing Transcend events in Athens and Munich. These weren’t just knowledge-sharing sessions — they were deep, honest conversations about the operational challenges facing the industry today, and how AI is being embraced not just as a tool, but as a catalyst for transformation. From safety and reliability, to economic optimization and workforce reskilling, the themes were clear — and the appetite for innovation was strong. We were proud to be joined by teams from OMV, Clariant, Rosneft, HelleniQ, MOL, MOH, BP, and others — each bringing perspective, experience, and sharp questions to the table. Here’s what a few attendees had to say: “Glad to see the mathematical foundations behind Imubit AI.” – OMV “Fantastic overview of process control optimization techniques.” – Clariant “A day full of valuable exchanges and deeper understanding of AI applications.” – Rosneft In the session “From coffee to crude: democratizing model building,” Imbuit Business Consultant, Dennis Rohe, gave us a hands-on taste of how accessible it can be to build models and derive decisions from raw data—whether you’re optimizing espresso or a conversion unit.   While meeting with refining leaders during our Transcend EU events, I asked a simple but important question: What are your top concerns? The first thing that came up — short term, day to day — is safety. Long term, it was survival. Will my company be around in 10 years, given the unpredictable macroeconomic environment and the company and the plant’s competitive position as a business? Tracing back from the existential question of survival, several key themes come up in conversations, and are evident in recent surveys as well: Reliability – Unplanned outages are a plague, especially in aging western refineries. Most unplanned outages are not formally reported, making it challenging to draw industry-wide data. Mckinsey writes about it here. Economic Optimization – When the plant runs safely and reliably, the priority shifts to optimization and dealing with the multi-year margin pressure and crude source dynamics. Workforce reskilling – Valued but not prioritized. 92% of executives appreciate the reskilling and training of their workforce, but due to a lack of urgency compared to safety, reliability, and optimization, this area is generally not prioritized, and only 29% of companies are investing in retraining. Survey is here. While the adoption of AI is increasingly paramount to the longevity and prosperity of every business, only 15% of Oil & Gas companies use AI in live, day-to-day operations. Only 3% report highly integrated use of AI. Several potential reasons came up for this lack of integration of AI into the daily refinery operations: Data privacy and cybersecurity Reliability of AI models and their trustworthiness Understandability of model outputs Bandwidth of plant engineers and operators – Keeping the plant running is a full-time job. Overload in company initiatives, where every problem solved with AI requires a multi-year initiative, with multidisciplinary support, governance structures and change management. What kind of AI can address these concerns and help refiners survive and thrive? Large Language Models (LLMs) are disrupting all industries and enabling small and large businesses from all sectors to accomplish more with their existing staff. Many roles are being redefined to leverage AI for automation of tasks which involve certain workflows and processing, while focusing human attention on areas that require a deep understanding of the environment and ability to come up with new ideas that the AI hasn’t seen before. While LLMs are proven to solve a wide range of problems, a different form of AI is required in addition to LLMs to solve these key problems. In order to trust AI models to make plant decisions, certain properties are required by refiners: The AI model must be trained on the plant’s specific dataset, or a known, documented, trusted dataset. Specifically, due to the safety-critical environment, plant engineers need to control every source of data fed into AI model training, and every datapoint within every data source. The plant process dynamics captured by the model must be transparent to the user, and also controlled by the user if desired. Modeling Democratization – everyone at the plant can evaluate, simulate, update and build models. Capture the true dynamics of the plant from the plant data and provide insights to all technical staff, not relying on human generated documentation and tribal knowledge, biased assumptions. Serve as single model for a specific area of the plant that represents the plant in such a way that is useful for all technical plant disciplines Single initiative that solves multiple problems, thereby reducing the need for engineers and operators to learn new tools, and reducing management and organizational burden of new initiatives, governance, change management.   Where Are You on the AIO Journey? If these challenges resonate with you, it may be time to evaluate where your operations stand on the path to truly integrated, refinery-grade AI Optimization. Request a complimentary AIO Readiness Assessment to understand how your plant can move beyond incremental improvements and start solving for reliability, optimization, and workforce enablement — with one trusted initiative. Schedule your AIO Assessment.    
Blog
April, 30 2025

Tuning Out the Noise in the Industrial AI Landscape

Moving from insight to automated action remains rare in a space crowded with advisory level insights. By Jennifer Shine, Principal Solution Engineer, Imubit Industrial AI is having a moment—and for good reason. Across refining and manufacturing, companies are focusing on digital transformation, betting that data and algorithms can unlock new levels of performance. But if you’ve spent time trying to make sense of the market, you’ve likely walked away more confused than confident. LNS Research recently published the blog “Five Ways Industrial AI is Shaking Up Manufacturing” which breaks the incredibly broad Industrial AI market into more manageable, use case driven bites. The piece categorizes more than 40 technology providers into one or more sub-categories including asset monitoring, process analytics, process control, productivity, and safety. Yet one of these categories is not like the others. While many of the vendors mentioned capture value by providing advisory insights to be actioned, only 6 players mentioned in the ‘process control’ sub-category are providing full closed-loop automation of identified insights. That’s a staggering gap—and it speaks volumes. Why is that? Why are the majority of “AI” providers still operating in open-loop advisory mode, offering dashboards and insights, but stopping short of truly optimized control? The short answer: closed-loop is hard. The longer answer is even more important—and it’s where the future of the industry is heading. If It Were Easy, Everyone Would Do It Let’s be clear: it’s not a lack of ambition keeping companies from closed-loop AI. It’s the sheer complexity of the task. Industrial plants are among the most secure, high-stakes environments in the world. Any AI system that closes the loop—making real-time decisions that affect throughput, emissions, or safety—has to meet a high bar. You’re not just dealing with data science. You’re integrating with a range of systems—distributed control systems (DCS), programmable logic controllers (PLCs), existing MPCs or legacy APCs, and any possible combination of the aforementioned—all while navigating strict cybersecurity protocols, meeting rigorous process safety requirements, and demonstrating deterministic behavior to some of the most technically demanding and skeptical stakeholders in the industry. That’s before you even get to change management or operational readiness. Most AI vendors stop short of closed-loop control because they simply don’t have the stack—or the domain knowledge—to cross that threshold. They may offer strong analytics or elegant user experience, but when it comes to operationalizing those insights into autonomous plant action, they hit a wall. Advisory-Only AI Leaves Value on the Table The first thing to examine when evaluating how much value an AI product can deliver is whether it depends on a human to act. I’ll be the first to acknowledge that domain experts are absolutely essential. They understand the plant, the context, and the goals in a way no model ever can. But let’s hypothesize that we can build an AI model that can accurately predict and prescribe what should be done to best optimize the plant. To do so requires your console operator to move a dozen variables every five minutes. That’s not a realistic ask for even your best operator. This is the trap of open-loop advisory systems. They offer insights—sometimes very sophisticated ones—but no reliable path to act on them consistently, completely, and continuously. The more complex your plant and your economic objectives, the more complex the optimal solution—and the more essential it becomes to automate execution. Put simply: the value of AI is in the doing, not just the knowing. True transformation requires closed-loop optimization, where the model doesn’t just advise—it acts. Solving the Hardest Problems in Closed Loop At Imubit, we specialize in what others shy away from: delivering real-time, closed-loop AI optimization (AIO) in the world’s most complex industrial environments. Our technology platform was built from the ground up to meet the rigorous demands of the process industries. We integrate directly with plant control systems, operate securely within your industrial network, and continuously optimize entire units. We’ve developed a proprietary AIO Engine that learns a plant’s true economic and physical behavior, even in places traditional models break down. It’s fully engineer-configurable, auditable, and designed for ongoing adaptation in a live plant environment. Imubit doesn’t just tell your team what could be better—in a fraction of the time it would take for the insight to make it down the communication chain to the control room, Imubit has already made the adjustment. It executes the optimized strategy, continuously adjusts to changing conditions, and makes sure value is captured, not left waiting on emailed targets or a screen. Technology is only half of the Imubit story—adoption, trust, and impact are what truly make it work. A team of former process engineering and process controls SMEs guide clients through a robust delivery process, involving plant engineers and operators at every step. Don’t Settle for Less Than Actionable The Industrial AI space will continue to be noisy, but it doesn’t have to be confusing. When evaluating vendors, look beyond the dashboards and ask: Is this actually delivering plant-level impact? Learn more about what sets Imubit Closed Loop AI Optimization (AIO) technology apart in Demystifying Industrial AI by Imubit CTO Nadav Cohen. Download the report.
Blog
March, 19 2025

Winning in the [Open] Industrial AI Era

Key session takeaways from the 2025 ARC Industry Forum By Allison Buenemann, Product Marketing Manager, Imubit It’s a toss up on which term got more air cover during the 2025 forum – ‘open’ or ‘AI’. If we go by session titles on the agenda, AI takes the cake with 16 mentions in session titles. Our take? The increasingly open industrial software landscape is paving the way for AI to add even more value in key use cases. Imubit’s role as the leading AI solution in the process optimization space was highlighted in a presentation by Marathon Petroleum Corporation followed by a lively panel session. Here are the highlights.   An AIO approach to Naphtha System Optimization In the 2025 ARC Forum session ‘AI-Powered Digital Twins,’ GT McDaniel, Process Controls Supervisor at Marathon Petroleum, shared his experience championing AIO technology, from corporate directive to tangible results. Having Board of Directors level support to pursue projects in AI removed a lot of the inertia that is sometimes experienced when implementing a new technology project. With this support in hand, they simply needed to match the right technology with the right problem to prove it out. The naphtha system at the Los Angeles Refinery was a good candidate for AIO because the variability with how the individual towers were controlled led to complex, nonlinear dynamics when trying to optimize the overall pool. The challenge was exacerbated by the fact that the three towers were split between two operations consoles, adding a layer of communication complexity. The nonlinear capabilities as well as the unification of optimization systems to a common platform for operator collaboration made AIO a great option. The AI optimizer had three objectives – maximize total naphtha, minimize the bypass around the system, and meet the economic target while reducing the variability in meeting that target. When all three of these were met, there was an added carbon benefit of steam production being minimized. Optimizing to these objectives has helped the refinery start to identify the bottlenecks in the field that prevent them from pushing harder. They’ve got a tool in place to visualize the benefits of things like valve trim replacements or reboiler cleanings that they didn’t have previously. The experts weighed in on what it takes to make an AI project successful and sustainable. The AI-Powered Digital Twins session closed with a panel discussion featuring AI practitioners from Marathon Petroleum and Petrobras alongside AI partners Imubit and EY. Peter Reynolds, Industry Analyst and Consultant for ARC Advisory Group, led the panel through a series of topics ranging from project justification to safety and maintainability. Here are the 5 key learnings from their discussion. 1. Ready your data. Marathon found that variables at some point perceived as unimportant weren’t being historized and so were unavailable for AIO modeling. While not always true, in modern times, data storage is cheap, and as long as it’s not causing an impact to the process operations we need to be historizing it for use in future cases. Petrobras discussed the role of governance, and employee accountability for data quality. Imubit Solution Manager John Milaszewski reassured that just because the data quality may not be there today, it doesn’t preclude you from a successful AI project. “A lot of what the implementation team at Imubit does in tandem with customers is defining the problem in the context of the information that’s currently available and building the reward or objective function from there.” For more on Imubit’s recommendations on this topic, check out our dedicated blog on ensuring your data is ready for AI. 2. Ready your people. Imubit acknowledged that at many customer sites, the low hanging fruit has already been picked, and the remaining problems are more complex. This complexity necessitates more powerful technologies to solve those problems, and people to champion the technologies. Marathon agreed that powerful solutions demand strong organizational setups to enable them to extract as much value as possible. For them, having both board and management support and strong technology champions have been instrumental to success. Petrobras’ ease at identifying champions has been a pleasant surprise for their corporate team. They’re seeing people eager to engage in AI projects, seeing new opportunities for their career and personal growth. EY added that when you’re working in innovation, sometimes you cannot prove the ROI, because you’re doing something nobody in the industry has done before. But management’s trust in the credibility of their technology champions can drive AI projects forwards. 3. Make it safe. People think about AI and they think skynet, and no way would we ever let that take control of our plant. A requirement for Marathon in their AIO implementation was the fact that the onsite model, the one connected to their control layers, was not learning online. John explained that Imubit is very intentional about this. “It’s all learned offline. Then the model is presented to the customer, we agree on what it’s learned, what it’s going to do, alright it’s locked in.” 4. Make it trustworthy. AI in any form can feel like a black box, so it’s important to find ways to decode what a model will do through interaction, visualization, and training. At Imubit, engineers on the solution team work with customers to demonstrate that even if the math is complex and you can’t write out the model equation, this is how you can see the model behave in a variety of situations. For Marathon, it was also important to show that once the AIO controller is online, it only operates within the boundaries that it’s been given. If it starts to deviate, it just turns off or it holds at that upper or lower limit. 5. Make it sustainable. Both Marathon and Petrobras agreed that a large part of making a technology project successful is choosing a good partner. You need the support from your organization– technologists, leaders, managers– and you also need your technology partners to be invested in your success. For GT as Process Controls Supervisor, his role is championing technology that gets the engineers on his team excited and wanting to engage in building the next model. Working with technology that is delightful to use, that pulls them in, and is supported by a partner that’s proactively monitoring the system, who is responsive and helps to drive sustainable technology adoption, has been critical to his success. Give your operators a ‘Golden Batch Day’ One of the common themes across many of the presentations at ARC Forum was human operators in the loop. People will continue to play a huge role in making technology deployments successful, and no role is more important to adoption than the role that can turn the technology off. Imubit’s John Milaszewski recalled his time working with Chevron Phillips Chemical and described his operator’s golden batch day as one where they came into a unit on-spec and lined out and kept things that way for the next 12 hours until they handed off a lined out, on-spec unit to their relief. Technology that can push a unit to its economic optimum without disrupting that golden batch day is technology that will remain on and generate value. Applying this guiding principle on top of the 5 strategies listed above will get you well on the way to a successful AI project implementation. Stay up to date with the latest in AIO advancements at imubit.com/aio.
Blog
February, 27 2025

A World Without Step Testing?!

By Greg White, Business Consulting Engineer, Imubit As a former Advanced Process Control (APC) Engineer, I spent many months building DMC+ models from scratch. Several steps were required, but the main ones were step testing, model simulation, and model development. Model simulation and model development were wholly contained within the APC group, but step testing necessitated operator participation and often led to frustration from both groups. Step testing is how APC engineers acquire the data needed to represent the relationships between MVs and CVs in the process unit. It involves a very finite period of time – usually about two weeks long – where operators (at the behest of APC engineers) make set point changes in Manipulated Variables (MVs) and the APC team measures the Control Variable (CV) responses. For units where set point targets rarely change, step testing is a way to gather process data at a range of values to begin to build meaningful empirical relationships. Anyone who has worked in a refinery or other industrial processing plant will agree that two weeks of data is hardly a representative sample of how a unit will operate over the half decade of feedslate changes, yield shifts, and fouling that occurs between major turnarounds. In an ideal case, the controller is rebuilt after every unit turnaround, however, this is a rarity due to a low perceived return on investment (ROI). The large amount of resources required to rebuild a controller is hard to justify when the goal will not be drastically different – continue to maximize high-value products up to a constraint. The resource cost mentioned above is mostly your APC engineers’ time. You’ll clock some process engineering, process safety, and perhaps instrumentation or reliability engineering time because their sign-off is usually required in the Management of Change (MOC) process. These costs, however, are dwarfed by the much larger cost of moving the refinery into a sub-optimal state in the name of data collection. You’ve seen this film before. The APC engineer approaches the console to gather CV response data for an MV move larger than typical process noise but not so large that it disturbs the unit. Negotiation between the APC Engineer and the Board Operator ensues, and each character’s underlying motivations are revealed. The Board Operator’s ideal shift is a smoothly operated unit with stable and predictable flows, temperatures, and pressures – an easy handoff to their relief. Quality targets are met, keeping management out of their hair. The last thing on the board operator’s mind is playing along with an engineer’s science experiment which may shake up this harmony. The screenplay of this critical [to the APC engineer] conversation usually looked something like this: APC Engineer: [enthusiastically] Good morning! Are you busy now? Board Operator: [groaning] Good morning… I thought I told you to bring donuts if you were going to come in here. APC Engineer: [temporarily deflated] Oh, I thought you were joking… [enthusiasm returns] Anywho, can you increase the fractionator overhead temperature by 5 degrees? Board Operator: [annoyed] Good grief, are you trying to dry out my LCO tray again? 5 degrees? That will back out the reflux rate too much, we won’t meet our 95% specs on products, and we can burn out the LCO pump if the tray runs dry. Go back to your office, get a better plan, bring donuts, then come back. APC Engineer: [persevering] Well, how about 3 degrees? Operations Supervisor: [aggravated] Hey, are you distracting my Board Operator? We need to get some hot work permits signed right now. We don’t have time to heat up the column just for fun. APC Engineer: [deflated] If I come back with donuts would you please increase the OVHD temp by 2 degrees? Board Operator: [compromising] Only if they’re chocolate. Lather, rinse and repeat for subsequent step changes. The data gathered in each step test is run through the model simulation, and the outcome is one singular gain relationship. It’s no wonder the relationship between operations and APC teams can be a strained one. Closed Loop Artificial Intelligence Optimization (AIO) takes a more modern approach to closed loop process optimization, leveraging years of pre-existing historical process data in lieu of step testing. With access to good quality data (learn more about data readiness for AI), Imubit can train a model that simulates the process plant relationships and provides predictions using only historical data. This AI-driven approach doesn’t lead to one simplified gain relationship between an MV and a CV. Rather, the output is a distribution of gains, with tens of thousands of different relationships identified over time under different real and simulated MV, CV, and DV value combinations (figure 1). With this composite knowledge of relationships between plant variables, the Imubit AIO controller optimizes the performance of your process unit toward a learned strategy. It eliminates the friction between operations and APC teams, aligning motivations and driving the plant toward the highest state of constraint-respecting operational efficiency. Figure 1. Imubit learns every possible relationship between two variables, as displayed in the interactive gain histograms. Check out our new Next Generation Workforce white paper to learn how Imubit AIO technology is breaking down silos between teams and creating an empowered, technology-savvy workforce.
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February, 26 2025

Opportunities for Positive ROI from the Application of AI to Refinery Processes

Imubit experts share insights in Petroleum Technology Quarterly This quarter, the Q&A section of Petroleum Technology Quarterly (PTQ) was loaded with interesting content about the application of AI and ML in refining and where refiners can expect to see the fastest return on investment (ROI) on these technologies. Imubit’s Principal Hydroprocessing Engineer weighed in on AI applications in closed loop process optimization and the impact our customers are seeing on their business. Some of the areas highlighted as particularly high ROI for AI-based process optimization included – Distillate System Optimization – in a presentation at last year’s American Fuel and Petrochemical Manufacturers (AFPM) Summit a medium sized US refiner reported 0.5°F improvement in average ULSD T90 vs baseline FCC System Optimization – in June 2024 Rocky Mountains region refiner Big West Oil shared that their use of AI for closed loop optimization has boosted debutanizer throughput capacity by 2% and overall liquid volume yield by 0.6% Coke Drum Cycle Optimization – at the 2024 AFPM Summit top US refiner Marathon Petroleum Corporation reported a significant improvement in coker giveaway thanks to a 25% reduction in suboptimal drum cycles Hydrocracker units are also proving value in their capacity to swap between naphtha and diesel outputs in response to market swings. While traditional closed loop optimization techniques may be designed to work towards a single yield strategy, AI-based approaches learn from all of a unit’s historical data, so strategies automatically adjust to changes to feed and product pricing to shift yields towards the more valuable product. For more on high ROI applications of AI and strategies to take advantage of hydrocracker flexibility check out the full Q&A in PTQ Q1 2025 online. AI with ROI More on Hydrocrackers
Blog
January, 28 2025

2024 Product Year in Review

Explainability, Collaboration, and New Applications of the Imubit Industrial AI Platform By Allison Buenemann, Product Marketing Manager, Imubit 2024 began and ended with a vision — to accelerate industrial innovation and value creation by democratizing AI, empowering domain experts to harness advanced AI capabilities in their daily work. The journey towards achieving this vision saw: Growth in platform users and personas Delight when your most requested features came to life Excitement for new use cases for the Imubit platform And a never-ending Curiosity for where your ideas will lead us next Figure 1. 2024 Growth of Imubit platform users in different personas   New features, enabling new use cases We were thrilled to see that your favorite, most-used platform features aligned with the year’s most talked about new use case – What-if simulations for operator and engineer optimization training. This use case, covered broadly in a Transcend 2024 presentation by Big West Oil, leverages platform Notes to save training scenarios consisting of certain unit conditions, constraints or price sets. Employees can test their skills against by applying any number of Manipulations where the impact of a simulated manipulated variable (MV) move is reflected on all other process and calculated variables, most notably, the unit’s economic objective function. Figure 2. Most used Imubit platform features of 2024   Other notable mentions in the most requested and delivered feature department include: Comparing Inferential Performance Interactivity & Directionality of SHAP Plots Timeseries View of Gain Relationships Figure 3. Interactivity & directionality enhancements to SHAP plots highlight contribution of input variables to inferentials   In Imubit’s 2024 Year in Review webinar, Product Managers Geraldine Hwang and Rex Tan delivered product demos showcasing explainability and collaboration features built into the Model Evaluation and Performance Dashboard applications. The demos highlighted: Explainability features to understand process dynamics, validate optimization strategies, and build organizational trust in AI models Leveraging Performance Dashboards to get full situational awareness in 30 seconds or less and dive deeper to investigate process upsets and controller engagement status Transparency of operator actions, event detailing, and institutional knowledge capture The groundwork is laid for an exciting 2025 and beyond in the Imubit platform. View the on-demand webinar to catch up on the product demos and more of the best of 2024!

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