An investigation of water gas shift reaction in a Pd-alloy membrane reactor with an optimized crossflow configuration

IF 8 Q1 ENERGY & FUELS Energy nexus Pub Date : 2023-09-16 DOI:10.1016/j.nexus.2023.100240
Wei-Hsin Chen , Shu-Cheng Li , Amit Kumar Sharma , Joon Ching Juan , Ayyadurai Saravanakumar
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Abstract

In this study, the performance of a high-temperature water gas shift reaction (WGSR) using a Fe-Cr catalyst along with a Pd alloy membrane was simulated by computational fluid dynamics (CFD). The influences of using Pd membranes, catalytic layer thickness ratio (R/R0), Reynolds number, and steam-to-CO ratio (S/C) on the reaction were investigated by comparing CO conversion and hydrogen recovery (HR). In the CFD simulation, one-tube and four-tube systems were simulated at 500 °C. This study also compared the performance between tandem and optimized configurations. The results show that the CO conversion can be improved up to 22.9% when the WGSR reactor system uses a Pd membrane compared to the system without a Pd membrane. The system has the best hydrogen recovery performance at S/C = 4 and R/R0 larger than 1.5. At Re=5, the optimized configuration for CO conversion has better performance when R/R0 is larger than 1.75. Compared to the tandem configuration, the optimized configuration also shows better performance for HR at every R/R0. The results indicate that a Pd membrane and optimized configuration can significantly improve CO conversion and that R/R0 and S/C optimization is very important for effective reactor performance.

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优化横流结构的钯合金膜反应器中水煤气移位反应的研究
本研究采用计算流体力学(CFD)方法模拟了Fe-Cr催化剂和Pd合金膜在高温水气转换反应(WGSR)中的反应性能。通过比较CO转化率和氢气回收率,考察了钯膜、催化层厚度比(R/R0)、雷诺数和蒸汽/ CO比(S/C)对反应的影响。在CFD模拟中,分别模拟了500℃下的单管和四管系统。本研究还比较了串联和优化配置的性能。结果表明,WGSR反应器系统使用Pd膜时CO转化率比不使用Pd膜时提高22.9%。系统在S/C = 4、R/R0大于1.5时氢气回收效果最好。在Re=5时,当R/R0大于1.75时,优化后的CO转换构型具有更好的性能。与串联配置相比,优化后的配置在每个R/R0都显示出更好的HR性能。结果表明,钯膜和优化配置可以显著提高CO转化率,R/R0和S/C优化对提高反应器性能非常重要。
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来源期刊
Energy nexus
Energy nexus Energy (General), Ecological Modelling, Renewable Energy, Sustainability and the Environment, Water Science and Technology, Agricultural and Biological Sciences (General)
CiteScore
7.70
自引率
0.00%
发文量
0
审稿时长
109 days
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