Hydrogen production from water gas shift reaction in a high gravity (Higee) environment using a rotating packed bed
Hydrogen production from water gas shift reaction in a high gravity (Higee) environment using a rotating packed bed
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DOI：
10.1016/j.ijhydene.2010.07.126
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发表时间：
2010-10-01
影响因子：
7.2
通讯作者：
Syu, Yu-Jhih
中科院分区：
文献类型：
--
作者：
Chen, Wei-Hsin;Syu, Yu-Jhih
在超重力环境下研究了水煤气变换反应制氢过程。使用含有Cu-Zn催化剂并在0 - 1800 rpm范围内旋转的旋转填充床（RPB）反应器来产生高离心力。反应温度和蒸汽/CO比分别为250 - 350 ℃和2 - 8。一个无量纲的参数，G数，推导出占离心力的增强WGSR的效果。在1800 rpm的转子速度下，在RPB中作用在反应物上的诱导离心力平均高达234 g。因此，从WGSR的CO转化率增加到70%，相比，没有旋转。这清楚地表明，离心力有利于氢气的产生，这是由于强化了传质并延长了反应物在催化剂床中的路径。根据勒夏特列原理，较高的反应温度或较低的蒸汽/CO比不利于CO转化;然而，在这种情况下，离心力对WGSR制氢的增强往往变得更加显著。因此，建立了CO转化率的提高与G数之间的相关性。总体而言，反应温度越高，水蒸气/CO比越低，G数函数的指数越高，对WGSR的离心力越好。(C)2010年教授T。Nejat Veziroglu。由爱思唯尔有限公司出版。保留所有权利。
Hydrogen production via the water gas shift reaction (WGSR) was investigated in a high gravity environment. A rotating packed bed (RPB) reactor containing a Cu-Zn catalyst and spinning in the range of 0-1800 rpm was used to create high centrifugal force. The reaction temperature and the steam/CO ratio ranged from 250 to 350 degrees C and 2 to 8, respectively. A dimensionless parameter, the G number, was derived to account for the effect of centrifugal force on the enhancement of the WGSR. With the rotor speed of 1800 rpm, the induced centrifugal force acting on the reactants was as high as 234 g on average in the RPB. As a result, the CO conversion from the WGSR was increased up to 70% compared to that without rotation. This clearly revealed that the centrifugal force was conducive to hydrogen production, resulting from intensifying mass transfer and elongating the path of the reactants in the catalyst bed. From Le Chatelier's principle, a higher reaction temperature or a lower steam/CO ratio disfavors CO conversion; however, under such a situation the enhancement of the centrifugal force on hydrogen production from the WGSR tended to become more significant. Accordingly, a correlation between the enhancement of CO conversion and the G number was established. As a whole, the higher the reaction temperature and the lower the steam/CO ratio, the higher the exponent of the G number function and the better the centrifugal force on the WGSR. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.