An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit

Gáspár, Jozsef; Ritschel, Tobias; Jørgensen, John Bagterp

doi:10.1016/b978-0-444-63965-3.50259-2

Cited by 2 publications

(2 citation statements)

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“…By their turn, Jin et al investigated the application of a plantwide control to ensure that the ASU could bear a high ramp rate and flexible operations when integrated into an oxy-combustion power plant, further evaluating the importance of an oxygen storage drum. Other recent publications are found in the field of automation and control. , Concerned about efficient control strategies to minimize plant energy consumption in a scenario of variable electricity prices, Gaspar et al . presented a dynamic model for cryogenic distillation and demonstrated the potential of open-loop optimal-control for reducing the cost of air separation.…”

Section: Introductionmentioning

confidence: 99%

“…Other recent publications are found in the field of automation and control. 12,13 Concerned about efficient control strategies to minimize plant energy consumption in a scenario of variable electricity prices, Gaspar et al 14 presented a dynamic model for cryogenic distillation and demonstrated the potential of open-loop optimal-control for reducing the cost of air separation.…”

Section: ■ Introductionmentioning

confidence: 99%

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Detailed Design and Economic Evaluation of a Cryogenic Air Separation Unit with Recent Literature Solutions

Young

Villardi

Araújo

et al. 2021

Ind. Eng. Chem. Res.

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Cryogenic air separation is a well-established technology. However, due to its associated energy intensity and hazardousness, new studies are always emerging on this topic. Nevertheless, economic feasibility studies of cryogenic separation plants are still scarce. Studies of this type are essential because installing an air separation unit can also be considered at the design stage of other common industrial projects, such as oxidation/ combustion processes and ammonia production. This study aims to elucidate the technical and economic aspects of a real-size air separation unit and analyze the feasibility of incorporating some alternatives recently proposed in the literature, such as multistage compression with and without an organic Rankine cycle for energy saving, integrated argon column, energy recovery systems in turbines, and a PSA unit for CO 2 removal, and in the implementation of a new plant. For this, we performed a rigorous simulation and a robust economic evaluation. Thus, it was possible to identify the main bottlenecks of the process, which may become the subject for future work. As a result, the relevance of the compression (34−36%) and refrigeration (54−55%) stages in the capital cost and the importance of conscious electricity (29−32% of the production costs) and maintenance spending for the process' economic viability were shown. Flowsheets and economic analysis are presented in detail so that they could be used as a base case for future developments in this field.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%