Comparison of co-current and counter-current flow in a bifunctional reactor containing ammonia synthesis and 2-butanol dehydrogenation to MEK |
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| Affiliation: | 1. Department of Chemical Engineering, University of the Basque Country (UPV/EHU), P.O. Box 644-48080, Bilbao, Spain;2. Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo, 02150, Finland;1. Fujian Provincial Key Laboratory of Functional Materials and Applications, Xiamen University of Technology, Xiamen, 361024, China;2. School of Materials Science and Engineering, Xiamen University of Technology, Xiamen, 361024, China;1. College of Physics and Materials Science, Henan Normal University, Xinxiang, Henan 453007, China;2. National Demonstration Center for Experimental Physics Education (Henan Normal University), Xinxiang, Henan 453007, China;3. Collaborative Innovation Center of Nano Functional Materials and Applications, Henan Province, China;1. School of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, PR China;2. National & Local United Engineering Research Centre for Chemical Process Simulation and Intensification, Xiangtan University, Xiangtan, Hunan, 411105, PR China;1. Laboratory of Chemical Technology and Catalysis, Department of Organic Chemistry, Biochemistry & Catalysis, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania;2. Department of Mechanical Engineering, Khalifa University of Science and Technology, 127788, Abu Dhabi, UAE;3. Department of Chemical Engineering, University of Western Macedonia, Koila, Kozani, 50100, Greece;4. Center for Catalysis and Separation, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box 127788, UAE |
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| Abstract: | In this study, a multi-tubular thermally coupled packed bed reactor in which simultaneous production of ammonia and methyl ethyl ketone (MEK) takes place is simulated. The simulation results are presented in two co-current and counter-current flow modes. Based on this new configuration, the released heat from the ammonia synthesis reaction as an extremely exothermic reaction in the inner tube is employed to supply the required heat for the endothermic 2-butanol dehydrogenation reaction in the outer tube. On the other hand, MEK and hydrogen are produced by the dehydrogenation reaction of 2-butanol in the endothermic side, and the produced hydrogen is used to supply a part of the ammonia synthesis feed in the exothermic side. Thus, 30.72% and 31.88% of the required hydrogen for the ammonia synthesis are provided by the dehydrogenation reaction in the co-current and counter-current configurations, respectively. Also, according to the thermal coupling, the required cooler and furnace for the ammonia synthesis and 2-butanol dehydrogenation conventional plants are eliminated, respectively. As a result, operational costs, energy consumption and furnace emissions are considerably decreased. Finally, a sensitivity analysis and optimization are applied to study the effect of the main process parameters variation on the system performance and obtain the minimum hydrogen make-up flow rate, respectively. |
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| Keywords: | Ammonia synthesis process Methyl ethyl ketone (MEK) production Thermally coupled reactor Co-current and counter-current flows Optimization |
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