Strategies for the robust simulation of thermally coupled distillation sequences

Navarro, Miguel A.; Javaloyes, Juan; Grossmann, Ignacio E.

doi:10.1016/j.compchemeng.2011.06.014

Cited by 36 publications

(21 citation statements)

References 40 publications

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“…It is possible to simulate a fully three thermally component distillation system using three conventional columns (see Figure ). The configurations in Figure a–d are equivalent …”

Section: Introductionmentioning

confidence: 99%

“… Equivalent configurations. (a) The thermal couple can be substituted by a superheated stream (distillation section) or subcooled stream (stripping section) and (b) or by a saturated stream and a heat stream, with negligible error. (c) Petlyuk configuration.…”

Section: Introductionmentioning

confidence: 99%

“…We can rigorously simulate the divided wall column using two conventional distillation columns connected by a combination of material and energy streams . In the rectifying section, the energy stream is equivalent to the energy removed if we include a partial condenser which provides reflux to the first column and the material stream is vapor at its dew point.…”

Section: Introductionmentioning

confidence: 99%

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Rigorous design of distillation columns using surrogate models based on Kriging interpolation

2015

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The economic design of a distillation column or distillation sequences is a challenging problem that has been addressed by superstructure approaches. However, these methods have not been widely used because they lead to mixed-integer nonlinear programs that are hard to solve, and require complex initialization procedures. In this paper, we propose to address this challenging problem by substituting the distillation columns by kriging-based surrogate models generated via state of the art distillation models. We study different columns with increasing difficulty, and show that it is possible to get accurate kriging based surrogate models. The optimization strategy ensures that convergence to a local optimum is guaranteed for numerical noise-free models. For distillation columns (slightly noisy systems), Karush-Kuhn-Tucker optimality conditions cannot be tested directly on the actual model, but still we can guarantee a local minimum in a trust region of the surrogate model that contains the actual local minimum.Topical Heading: Process System Engineering.

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“…It is possible to simulate a fully three thermally component distillation system using three conventional columns (see Figure ). The configurations in Figure a–d are equivalent …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rigorous design of distillation columns using surrogate models based on Kriging interpolation

2015

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“…In order to derive the DDoF for the DWC, the corresponding vapor and liquid splits for the thermal coupling have to be determined subsequently from the transferred mass and energy streams. Nevertheless, as indicated by Navarro et al [65] the method provides excellent initial values for the thermally coupled configuration. Several authors argue that equation-oriented (EO) simulation and optimization approaches are superior to sequential-modular (SM) approaches [26,72,74].…”

Section: Rigorous Simulation Modelsmentioning

confidence: 94%

Section: Conceptual Design Of Dividing Wall Columnsmentioning

confidence: 97%

Conceptual Design of Highly Integrated Processes – Optimization of Dividing Wall Columns

Waltermann

Skiborowski

2017

Chemie Ingenieur Technik

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Process intensification provides a whole toolbox of innovative solutions for improved energy efficiency of chemical processes. However, evaluation of this potential is hampered by the unavailability of suitable models and design tools. Integrated processes like dividing wall columns either have to be mapped by available unit operation models or tailored equation‐based models have to be developed. The current article reviews available methods for conceptual design and optimization of dividing wall columns and provides a detailed comparison of two representative optimization approaches.

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Process Synthesis and Integration

El‐Halwagi

Foo

2014

Kirk-Othmer Encyclopedia of Chemical Technology

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Process synthesis is a key design activity which focuses on the generation of alternatives for creating new processes or retrofitting existing ones. It is closely tied to process integration which is a holistic approach to design and operation which focuses on the unity of the process . This article provides a brief overview of process synthesis and integration. The focus is on key concepts, tools, and applications. The discussion is organized over classes of problems. First, the synthesis of energy systems is discussed with emphasis on the thermal pinch analysis for the conservation of heat through the integration of process hot and cold streams. Next, the material recovery pinch diagram is presented as a basis for reducing the use of fresh resources and the discharge of waste materials through reuse and recycle. Then, the field of process network synthesis is briefly reviewed. Moving to reactive systems, the topics of reaction pathways synthesis, attainable reaction regions, and reactor network synthesis are discussed. The chapter concludes with a discussion of the simultaneous process and molecular design.

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Strategies for the robust simulation of thermally coupled distillation sequences

Cited by 36 publications

References 40 publications

Rigorous design of distillation columns using surrogate models based on Kriging interpolation

Rigorous design of distillation columns using surrogate models based on Kriging interpolation

Conceptual Design of Highly Integrated Processes – Optimization of Dividing Wall Columns

Process Synthesis and Integration

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