Methanol production in an optimized dual-membrane fixed-bed reactor |
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| Authors: | M Farsi A Jahanmiri |
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| Affiliation: | 1. Department of Chemical Engineering, Shiraz University of Technology, Shiraz 71555-313, Iran;2. Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz 71345, Iran;1. Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia;2. A.V. Topchiev Institute of Petrochemical Synthesis, Moscow, Russia;3. UOP LLC, a Honeywell Company, USA;1. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand;2. Center of Excellence in Particle Technology, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand;3. PTT Innovation Institute, PTT Company Limited, Ayutthaya 13170, Thailand;1. Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz 71345, Iran;2. Department of Chemical Engineering and Materials Science, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, United States;3. Gas Center of Excellence, Shiraz University, Shiraz 71345, Iran;1. Chemical and Environmental Engineering Group, Islamic Azad University, Tehran South Branch, Deh-haqi Street, Tehran, Iran;2. Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, P. O. Box 11365-9465, Iran;1. Politecnico di Milano, Dipartimento di Energia, Laboratorio di Catalisi e Processi Catalitici, Piazza L. da Vinci 32, 20133 Milano, Italy;2. Total Refining & Chemicals, 2 Place Jean Millier – La Défense 6, 92078 Paris La Défense Cedex, France |
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| Abstract: | Coupling reaction and separation in a membrane reactor improves the reactor efficiency and reduces purification cost in the following stages. This paper focuses on modeling and optimization of methanol production in a dual-membrane reactor. In this configuration, conventional methanol reactor is supported by Pd/Ag membrane tubes for hydrogen permeation and alumina–silica composite membrane tubes for water vapor removal from the reaction zone. A steady state heterogeneous one-dimensional mathematical model is developed to predict the performance of this novel configuration. In order to verify the accuracy of the model, simulation results of the conventional reactor is compared with available industrial plant data. The main advantages of the optimized dual-membrane reactor are: higher CO2 conversion, the possibility of overcoming the limitation imposed by thermodynamic equilibrium, improvement of the methanol production rate and its purity. Genetic algorithm as an exceptionally simple evolution strategy is employed to maximize the methanol production as the objective function. This configuration has enhanced methanol production rate by 13.2% compared to industrial methanol synthesis reactor. |
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