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Showing records 1 to 25 of 156. [First] Page: 1 2 3 4 5 Last
Model Based Process Development and Operation of a Fluid Bed Granulation Unit to Manufacture Pharmaceutical Tablets
Salvador García Muñoz, Maitraye Sen, Shashwat Gupta, Ronald Ruff
July 16, 2024 (v2)
Keywords: Process Operations
A hybrid model for the fluid bed granulation operation was built. The deterministic component focuses on the mass and energy balances representing the water ingress and egress from the powder bed. The empirical one does on granule growth. Estimability techniques were used to determine which parameters to regress from the available data. A partial least squares approach was used to better understand the impact of the model parameters onto key model responses and sensitivity plots were made to aid operational decisions and support pharmaceutical development.
Proceedings of the 10th International Conference on Foundations of Computer-Aided Process Design (FOCAPD 2024)
Thomas A. Adams II, Matt Bassett, Selen Cremaschi, Monica Zanfir
July 9, 2024 (v1)
Keywords: Chemical Engineering, Modelling, Numerical Methods, Optimization, Process Control, Process Design, Simulation
Contains 134 original peer-reviewed research articles and 10 extended abstracts submitted to FOCAPD 2024. Subject categories include Invited Plenary and Keynote Submissions, Advances in PSE Design, Design and Emerging Fields, Design and Energy Transitions, Design and Sustainability, and Design Education and Future of Design. The scope is process design as it applies to process systems engineering in chemical engineering, energy systems engineering, and related fields.
Design Education Across the Curriculum for the Future of Design
Ashlee N. Ford Versypt
July 9, 2024 (v1)
Subject: Education
Keywords: Education, Modelling and Simulations
The future of computer-aided process design hinges on continued recruitment, training, and retention of the next generations of engineers. Many elementary and secondary school programs focused on engineering have made substantial impacts in informing children about careers in science, technology, engineering, and mathematics (STEM). A report by the National Academies established three general principles for pre-college engineering education, the first of which is that elementary and secondary engineering education should emphasize engineering design. Curricula focused on teaching the engineering design process have been developed for K-12 students and educators... (ABSTRACT ABBREVIATED)
New Design Paradigm for Integrated Energy Systems Needed for Sustainability
David Tucker, N. Farida Harun, Biao Zhang, Nana Zhou, Samuel Bayham
July 9, 2024 (v1)
Keywords: Energy Systems, Intelligent Systems, Process Control, Process Design, System Identification
Achieving sustainability in the energy sector re-quires an economically viable path with a balanced tran-sition that does not aggravate environmental and socio-logical problems associated with current fossil-based power production. Increasing the grid penetration of intermittent renewables to realize a sustainable energy future without consideration of the balanced transition may result in devastating economic and societal impacts [1]. As we press for the minimization of renewable power curtailment, current fossil-based technology struggles to meet demand under extreme transient and part-load conditions. This results in dramatic reduction of efficiency and a corresponding increase in emissions of not only carbon, but far more devastating pollutants... (ABSTRACT ABBREVIATED)
Challenges in Design for Sustainability
Gavin Towler
July 9, 2024 (v1)
Keywords: Process Design, Renewable and Sustainable Energy
There is a global consensus that steps must be taken to mitigate the impact of anthropogenic climate change. The Paris Agreement on climate change has been ratified by 192 countries and the signatories have pledged to make changes to their patterns of energy and land use that achieve “carbon neutrality” or net-zero emissions of greenhouse gases (GHG) by approximately mid-century. In these countries, energy ministries, energy companies and utilities are evaluating alternative fuels and power sources that can deliver the heat and power required for a modern economy with reduced GHG emissions. While technically proven low-emissions alterna-tives exist for almost every application, most of these alternatives cost substantially more than the fuels or energy sources they replace. Consequently, most countries will use a combination of regulations, taxes and subsidies to distort the energy market in favor of the lower-emissions alternatives... (ABSTRACT ABBREVIATED)
Decarbonization of Oil Refineries through Electrification and Low-Carbon Feedstocks
Ana I. Torres
July 9, 2024 (v1)
Keywords: Decarbonization, Green Fuels, Oil refineries, Process Design, Renewable and Sustainable Energy
Chemical Process Industries must navigate a series of changes in their operations to comply with increasing sustainability targets. These changes may involve the use of electricity-based operations, the implementation of carbon capture strategies, and the use of biomass or end-of-life carbon-containing waste as feedstocks. De-carbonizing oil refineries is particularly challenging as they possess highly valuable infrastructure. Discarding this infrastructure before the end of its life to build entirely new electric and biomass-based operations does not seem to be an economical or even a sustainable solution. This presentation will cover recent work in my group related to the decarbonization of oil refineries, focusing on proposing solutions that could be integrated with existing plants... (ABSTRACT ABBREVIATED)
Forces Shaping the Future of Design and Design Education
Jeffrey J Siirola
July 9, 2024 (v1)
Subject: Education
Keywords: Carbon Dioxide Capture, Hydrogen, Parameter Optimization, Process Design, Process Electrification, Process Synthesis, Structural Optimization
All ABET-accredited engineering programs mandate a culminating major design experience based on knowledge and skills acquired in earlier course work and incorporating realistic appropriate engineering standards and multiple realistic constraints. Some chemical companies organize their Manufacturing Innovation Process into a sequence of stages which typically include Need Identification, Product Design, Basic and Detailed Chemistry, Process Design, Equipment Design, Plant Design, Detailed Engineering and Vendor Specifications, Component Acquisition, Plant Construction Planning and Execution, Operating Procedure Development, Plant Commissioning and Start-up, and Production Planning, Scheduling, and Operation. Each of these stages involve the solution of many "design" problems that could be the subject of the culminating undergraduate chemical engineering design experience... (ABSTRACT ABBREVIATED)
The Current Status of Process and Product Design – What and How to Teach – and a Vision for the Future
Warren D. Seider, Daniel R. Lewin
July 9, 2024 (v1)
Subject: Education
Keywords: Education, Process Design, Product Design
Process design is a core component of chemical en-gineering education and either involves or is followed by an extensive design project in most schools. The design project is often considered a core activity in the educa-tion of future chemical engineers because it develops their skills in creative and critical thinking beyond the boundaries of their acquired knowledge, as well as training them in teamwork. Such skills are likely to be crucial to empower students to develop process technologies that respond to the relevant future challenges in process design. These future challenges include accommodating alternative raw materials and energy resources, addressing sustainability concerns, and arranging production schedules that are more flexible... (ABSTRACT ABBREVIATED)
Design for Flexibility: A Robust Optimization Approach
Jnana Sai Jagana, Congqin Ge, Zhihong Yuan, Satyajith Amaran, Qi Zhang
July 9, 2024 (v1)
Subject: Optimization
Flexibility is a critical feature of any industrial system as it tells us about the range of conditions under which the system can effectively and safely operate. It is becoming increasingly important as we face greater volatilities in market conditions, diverse customer needs, more stringent safety and environmental regulations, the growing use of resources with varying availability such as renewable energy, and an increased likelihood of disruptions caused by, for example, extreme weather... (ABSTRACT ABBREVIATED)
Designing for the Future: The Role of Process Design in Decarbonization and Energy Transition
M. M. Faruque Hasan
July 9, 2024 (v1)
Keywords: Carbon Capture, Decarbonization, Energy, Energy Efficiency, Energy Transition, Process Design, Process Synthesis
The overarching goal of process design (Figure 1) is to find technologically feasible, operable, economically attractive, safe and sustainable processing pathways and process configurations with specifications for the connectivity and design of unit operations that perform a set of tasks using selected functional materials (e.g., catalysts, solvents, sorbents, etc.) to convert a set of feed-stocks or raw materials into a set of products with desired quality at a scale that satisfies the demand. Process synthesis and integration can further screen, optimize and improve these pathways for given techno-econo-environmental targets or objectives. These objectives may include, but are not limited to, minimizing the overall investment and processing costs, minimizing the energy consumption, minimizing the emissions or wastes, maxim-zing the profit, and enhancing the safety, operability, controllability, flexibility, circularity, and sustainability, among others... (ABSTRACT ABBREVIATED)
Process Design for the Energy Transition: An Industrial Perspective
Jaffer H. Ghouse
July 9, 2024 (v1)
Keywords: Ammonia, Energy Systems, Hydrogen, Optimization, Process Design
The United States’ Inflation Reduction Act (IRA) of 2022 has established incentives to facilitate the energy transition. While these policies provide economic incen-tives that encourage investment and may reduce financial risk for the private sector on the supply side, transitioning to a lower carbon or net-zero economy by 2050 presents several challenges. These include designing flexible production systems that can interact with inter-mittent renewable energy resources, ensure process safety, redesigning existing energy infrastructure to support new energy carriers like hydrogen or ammonia, and making long-term investment decisions in an uncertain and evolving market... (ABSTRACT ABBREVIATED)
Accelerating Discovery in Consumer Product Design
Brian T. Gettelfinger
July 9, 2024 (v1)
Keywords: Consumer Products, Design, Modelling
At Procter and Gamble, innovation is based on a framework of Irresistible Superiority [1] that utilizes five complementary components – Products, Packages, Communication, Retail Execution, and Value. Increasing-ly, the computational techniques heavily leveraged with-in the Process Systems Engineering community are play-ing a leading role in delivering these five vectors, and they become increasingly valuable as we aim to deliver products in more exploratory consumer spaces – where combining high-volume data, advanced modeling, and quantified uncertainty will allow us to discover and deliv-er better products faster than ever before...
Laying the foundations of Machine Learning in Undergraduate Education through Engineering Mathematics
Pavan Kumar Naraharisetti
July 9, 2024 (v1)
Subject: Education
Keywords: Education, Machine Learning, Modelling, Numerical Methods, Optimization, Process Control
Some educators place an emphasis on the commonalities between engineering mathematics with process control, among others and this helps students see the bigger picture of what is being taught. Traditionally, some of the concepts such as diffusion and heat transfer are taught with a mathematical point of view. Now-a-days, Machine Learning (ML) has emerged as topic of greater interest to both educators and learners and new and disparate modules are sometimes introduced to teach the same. With the emergence of these new topics, some students (falsely) believe that ML is a new field that is somehow different and not linked to engineering mathematics. In this work, we show the link between the different topics from engineering mathematics, that are traditionally taught in UG education, with ML. We hope that educators and learners will appreciate the treatise and think differently, and we further hope that this will further increase the interest to improve ML models.
Analysis of Chemical Engineering Curricula Using Graph Theory
Blake R. Lopez, Victor M. Zavala
July 9, 2024 (v1)
Subject: Education
Keywords: Curriculum, Education, Graph Theory
Chemical engineering is a highly complex interconnected major. Just as chemical engineers have broken complex processes into unit operations, the chemical engineering curriculum has been broken up into courses. The organization of these courses vary among institutions and are based on years of prior teachings and research. Despite this, there have been calls to revaluate the curriculum from both industry and academia. We propose a graph-based representation of curricula in which topics are represented by nodes and topic dependencies are represented by directed edges forming a directed acyclic graph. This enables using graph theory measures and tools to provide formal ways of evaluating a curriculum. Additionally, the abstraction is readily understandable meaning conversations between instructors regarding the curriculum can occur within a department and even across institutions. This abstraction is explained with a simplified curriculum and applied to the undergraduate chemical enginee... [more]
Model Diagnostics for Equation-Oriented Models: Roadblocks and the Path Forward
Andrew Lee, Robert B. Parker, Sarah Poon, Dan Gunter, Alexander W. Dowling, Bethany Nicholson
July 9, 2024 (v1)
Keywords: Education, Modelling and Simulations, Optimization, Pyomo, Simulation
Equation-Oriented (EO) modeling techniques have been gaining popularity as an alternative for simulating and optimizing process systems due to their flexibility and ability to leverage state-of-the-art solvers inaccessible to many procedural modeling approaches. Despite these advantages, adopting EO modeling tools remains challenging due to the significant learning curve and effort required to build and solve models. Many techniques are available to help diagnose problems with EO process models and reduce the effort required to create and use them. However, these techniques still need to be integrated into EO modeling environments, and many modelers are unaware of sophisticated EO diagnostic tools. To survey the availability of model diagnostic tools and common workflows, the U.S. Department of Energy’s Institute for the Design of Advanced Energy Systems (IDAES) has conducted user experience interviews of users of the IDAES Integrated Platform (IDAES-IP) for process modeling. The inter... [more]
Integration of Process Design and Intensification Learning via Combined Junior Course Project
Madelyn R. Ball, Oishi Sanyal, Yuhe Tian
July 9, 2024 (v1)
Subject: Education
Keywords: Carbon Capture, Education, Modelling and Simulations, Process Design, Process Intensification
We present the implementation of combined junior course projects encompassing three core courses: reaction engineering, separations, and process simulation and design. The combined project aims to enhance the vertical integration of process design learning through all levels of the curriculum. We design the projects to utilize novel modular process technologies (e.g., membrane separation) and to emphasize new process design goals (e.g., sustainability, decarbonization). Two example projects, respectively on green methanol synthesis and ethylene oxide production, are showcased for project implementation. Feedback from junior and senior students is also presented to motivate the development of such joint project in CHE curriculum. We will also discuss the challenges we hope to address to maximize student learning from this unique project.
Jacobian-based Model Diagnostics and Application to Equation Oriented Modeling of a Carbon Capture System
Douglas A. Allan, Anca Ostace, Andrew Lee, Brandon Paul, Anuja Deshpande, Miguel A. Zamarripa, Joshua C. Morgan, Benjamin P. Omell
July 9, 2024 (v1)
Equation-oriented (EO) modeling has the potential to enable the effective design and optimization of the operation of advanced energy systems. However, advanced modeling of energy systems results in a large number of variables and non-linear equations, and it can be difficult to search through these to identify the culprit(s) responsible for convergence issues. The Institute for the Design of Advanced Energy Systems Integrated Platform (IDAES-IP) contains a tool to identify poorly scaled constraints and variables by searching for rows and columns of the Jacobian matrix with small L2-norms so they can be rescaled. A further singular value decomposition can be performed to identify degenerate sets of equations and remaining scaling issues. This work presents an EO model of a flowsheet developed for post-combustion carbon capture using a monoethanolamine (MEA) solvent system as a case study. The IDAES diagnostics tools were successfully applied to this flowsheet to identify problems to im... [more]
An Update on Project PARETO - New Capabilities in DOE's Produced Water Optimization Framework
Miguel A. Zamarripa, Elmira Shamlou, Javal Vyas, Travis Arnold, Philip Tominac, Melody H. Shellman, Markus Drouven
July 9, 2024 (v1)
Subject: Optimization
Keywords: MILP, MINLP, network optimization, process design, produced water management
Managing oil and gas produced water, characterized by hypersalinity and large volumes, presents significant challenges. This paper introduces an advanced optimization framework, PARETO, which offers a novel approach to strategic water management, emphasizing produced water (PW) treatment, quality tracking, quantification of emissions, and environmental justice. This work presents a case study showcasing different produced water management challenges. The PARETO framework demonstrated its effectiveness in optimizing water management strategies in line with environmental sustainability and regulatory compliance.
Exploring Net-Zero Greenhouse Gas Emission Routes for Bio-Production of Triacetic Acid Lactone: An Evaluation through Techno-Economic Analysis and Life Cycle Assessment
Ching-Mei Wen, Charles Foster, Marianthi Ierapetritou
July 9, 2024 (v1)
Subject: Environment
Keywords: Life Cycle Assessment, Technoeconomic Analysis
Triacetic acid lactone (TAL) is a bio-privileged molecule with potential as a chemical precursor, traditionally synthesized from petroleum. Current trends are shifting towards the use of renewable biomass or CO2-derived feedstocks to enhance sustainability. However, comprehensive studies on the techno-economic viability and carbon life cycle of such methods are limited. This study assesses TAL production from conventional glucose and a novel approach co-feeding Yarrowia lipolytica (YL) with glucose and formic acid (FA), aiming for a more cost-effective and eco-friendly process. We confront the inherent challenges in this process by exploring different technology scenarios using kinetic bioprocess modeling underpinned by techno-economic analysis (TEA) and life cycle assessment (LCA) to identify the most cost-effective and sustainable routes to TAL production. A noteworthy component of our investigation centers around the prospect of recycling and utilizing the CO2 emitted from the YL bi... [more]
Sustainable Aviation Fuels (SAF) from Ethanol: An Integrated Systems Modeling Approach
Madelynn J. Watson, Aline V. da Silva, Pedro G. Machado, Celma O. Ribeiro, Cláudio A.O. Nascimento, Alexander W. Dowling
July 9, 2024 (v1)
Subject: Environment
This work explores the economic and environmental opportunities for sustainable aviation fuel (SAF) in the Brazilian sugarcane industry. Brazil was one of the first countries to use biomass fuels for transportation and is currently the 2nd largest producer of the world’s bioethanol. Bioethanol produced from sugarcane can be upgraded to SAF via the American Society for Testing and Materials (ASTM)-certified pathway alcohol-to-jet (ATJ); however, at least two challenges exist for commercial implementation. First, technologies to produce bio-jet fuels cost more than their conventional fossil-based counterparts. Second, there is considerable uncertainty regarding returns on investment as the sugar and ethanol markets have been historically volatile. As such, we propose a new optimization model to inform risk-conscious investment decisions on SAF production capacity in sugarcane mills. Specifically, we propose a linear program (LP) to model an integrated sugarcane mill that can produce suga... [more]
Dimensionality Reduction in Optimal Process Design with Many Uncertain Sustainability Objectives
Hongxuan Wang, Andrew Allman
July 9, 2024 (v1)
Keywords: Multi-Objective Optimization, Network Theory, Renewable and Sustainable Energy
The study of sustainable design has gained prominence in response to the growing emphasis on environmental and social impacts of critical infrastructure. Addressing the different dimensions inherent in sustainability issues necessitates the application of many-objective optimization techniques. In this work, an illustrative four-objective design system is formulated, wherein uncertainties lie within two different socially-oriented objectives. A stochastic community detection approach is proposed to identify robust groupings of objectives. The findings reveal that the modularity of the optimal solution surpasses that of the average graph, thus demonstrating the efficacy of the proposed approach. Furthermore, a comprehensive exploration of the Pareto frontiers for both the robust and single-scenario best groupings is undertaken, demonstrating that using the robust grouping results in little to no information loss about tradeoffs.
Optimal Design of a Biogas-based Renewable Power Production System
Vikram Uday, Sujit Jogwar
July 9, 2024 (v1)
Keywords: Heat integration, Optimization, Process design, Renewable electricity
This paper presents optimal design for an energy-integrated biogas-fuel cell system for renewable electricity generation. The integrated process consists of two steps. The first step generates hydrogen from biogas via methane steam reforming (SMR), whereas the second step electrochemically converts this hydrogen into electricity using a solid oxide fuel cell (SOFC). These two steps are coupled via material and energy integration. Specifically, various design alternatives like anode and/or cathode gas recycling, biogas upgradation by CO2 removal, external versus direct internal reforming, and auxiliary power production through steam and/or micro gas turbine are explored to improve the overall efficiency and total annualized cost of the system. Specifically, a flowsheet superstructure is developed by incorporating all the available design alternatives. An optimal flowsheet with minimum total annualized cost is extracted from this superstructure using formal optimization techniques to mee... [more]
Designing Reverse Electrodialysis Process for Salinity Gradient Power Generation via Disjunctive Programming
Carolina Tristán, Marcos Fallanza, Raquel Ibáñez, Ignacio E. Grossmann, David Bernal Neira
July 9, 2024 (v1)
Keywords: Life Cycle Analysis, Modelling and Simulations, Optimization, Process Design, Pyomo, Renewable and Sustainable Energy
Reverse electrodialysis (RED) is a nascent renewable technology that generates clean, baseload electricity from salinity differences between two water streams, a renewable source known as salinity gradient energy (SGE). Full-scale RED progress calls for robust techno-economic and environmental assessments. Using generalized disjunctive programming (GDP) and life cycle assessment (LCA) principles, this work proposes cost-optimal and sustainable RED process designs involving different RED stack sizes and width-over-length ratios to guide the design and operation from the demonstration to full-scale phases. Results indicate that RED units will benefit from larger aspect ratios with a relative increase in net power of over 30% with 6 m2 membrane size. Commercial RED unit sizes (0.25–3 m2) require larger aspect ratios to reach an equal relative increase in net power but exhibit higher power densities. The GDP model devises profitable RED process designs for all the assessed aspect ratios in... [more]
Sustainable Process Systems Engineering – You’re Doing It Wrong!
Raymond L. Smith
July 9, 2024 (v1)
Most studies in process systems engineering are applying incomplete methods when incorporating sustainability. Including sustainability is a laudable goal, and practitioners are encouraged to develop systems that promote economic, environmental, and social aspects. Ten methods that are often overlooked in performing sustainable process systems engineering are listed in this effort and discussed in detail. Practitioners are encouraged to create designs that are inherently safer, to be more complete in their identification of process chemicals used and released, to be complete in their definitions of supply chains, and to apply additional environmental impact categories. Other methods point to items that are factors in process systems engineering such as disruptive recycling, robust superstructures for optimizations, and employing complete sets of objectives. Finally, users should be aware that sustainability tools are available, which might have been outside of their awareness.
Mathematical Optimization of Separator Network Design for Sand Management
Pooja Zen Santhamoorthy, Selen Cremaschi
July 9, 2024 (v1)
Keywords: Oil and Gas, Optimization, Planning, Sand, Separator
Sand produced along with well-production fluids accumulates in the surface facilities over time, taking valuable space, while the sand carried with the fluids damages downstream equipment. Thus, sand is separated from the fluid in the sand traps and separators and removed during periodic clean-ups. But at high sand productions, the probability of unscheduled facilities shutdowns increases. Such extreme production conditions can be handled by strategic planning and optimal design of the separator network to enable maximum sand separation at minimal equipment cost while ensuring the accumulation extent is within tolerable limits. This paper develops a mathematical model to optimize the separator network design to maximize sand separation while the sand accumulation extent and total equipment cost are minimal. The optimization model is formulated using multi-objective mixed-integer nonlinear programming (MINLP). The capabilities of the developed model to assist sand management in the sepa... [more]
Showing records 1 to 25 of 156. [First] Page: 1 2 3 4 5 Last