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Optimal Design of a Two-Stage Membrane System for Hydrogen Separation in Refining Processes
Article

Membrane-Based Processes: Optimization of Hydrogen Separation by Minimization of Power, Membrane Area, and Cost

1
CAIMI Centro de Aplicaciones Informáticas y Modelado en Ingeniería, Universidad Tecnológica Nacional, Facultad Regional Rosario, Zeballos 1346, Rosario S2000BQA, Argentina
2
Department of Chemical Engineering, University of Alicante, Apartado de correos 99, 03080 Alicante, Spain
3
INGAR Instituto de Desarrollo y Diseño (CONICET−UTN), Avellaneda 3657, Santa Fe S3002GJC, Argentina
*
Author to whom correspondence should be addressed.
The authors contributed equally to this work.
Processes 2018, 6(11), 221; https://doi.org/10.3390/pr6110221
Received: 29 September 2018 / Revised: 29 October 2018 / Accepted: 7 November 2018 / Published: 12 November 2018
(This article belongs to the Special Issue Membrane Materials, Performance and Processes)
This work deals with the optimization of two-stage membrane systems for H2 separation from off-gases in hydrocarbons processing plants to simultaneously attain high values of both H2 recovery and H2 product purity. First, for a given H2 recovery level of 90%, optimizations of the total annual cost (TAC) are performed for desired H2 product purity values ranging between 0.90 and 0.95 mole fraction. One of the results showed that the contribution of the operating expenditures is more significant than the contribution of the annualized capital expenditures (approximately 62% and 38%, respectively). In addition, it was found that the optimal trade-offs existing between process variables (such as total membrane area and total electric power) depend on the specified H2 product purity level. Second, the minimization of the total power demand and the minimization of the total membrane area were performed for H2 recovery of 90% and H2 product purity of 0.90. The TAC values obtained in the first and second cases increased by 19.9% and 4.9%, respectively, with respect to that obtained by cost minimization. Finally, by analyzing and comparing the three optimal solutions, a strategy to systematically and rationally provide ‘good’ lower and upper bounds for model variables and initial guess values to solve the cost minimization problem by means of global optimization algorithms is proposed, which can be straightforward applied to other processes. View Full-Text
Keywords: H2 separation; membranes; multi-stage process; optimization; design; operation; cost; membrane area; energy; mathematical programming; NLP; GAMS H2 separation; membranes; multi-stage process; optimization; design; operation; cost; membrane area; energy; mathematical programming; NLP; GAMS
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MDPI and ACS Style

Mores, P.L.; Arias, A.M.; Scenna, N.J.; Caballero, J.A.; Mussati, S.F.; Mussati, M.C. Membrane-Based Processes: Optimization of Hydrogen Separation by Minimization of Power, Membrane Area, and Cost. Processes 2018, 6, 221. https://doi.org/10.3390/pr6110221

AMA Style

Mores PL, Arias AM, Scenna NJ, Caballero JA, Mussati SF, Mussati MC. Membrane-Based Processes: Optimization of Hydrogen Separation by Minimization of Power, Membrane Area, and Cost. Processes. 2018; 6(11):221. https://doi.org/10.3390/pr6110221

Chicago/Turabian Style

Mores, Patricia L., Ana M. Arias, Nicolás J. Scenna, José A. Caballero, Sergio F. Mussati, and Miguel C. Mussati. 2018. "Membrane-Based Processes: Optimization of Hydrogen Separation by Minimization of Power, Membrane Area, and Cost" Processes 6, no. 11: 221. https://doi.org/10.3390/pr6110221

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