Modeling Studies on Fixed Bed Membrane Reactor for WGSRBased Hydrogen Production:PEM Fuel Cell Applications

Document Type: Original Article

Authors

1 Department of Chemical Engineering, Faculty of Engineering, Kashan, Iran

2 Department of Chemical Engineering, University of Kashan, Kashan, Iran

Abstract

Fuel cell based modular power generation can be achieved by miniaturization and process
intensification of equipment in the process. Fuel cells require hydrogen rich gas which can be
generated through reforming and water gas shift reaction. The goal of this study is to point out
the effect of the relative values of membrane perm selectivity, permeation flux and investigation
of a water gas shift membrane reactor with operating temperature (high temperature). This was
achieved by simulating the operation of an isothermal tube–shell reactor. The water gas shift
reactor being kinetically limited occupies more volume to achieve the required CO conversion.
Membrane model has been first validated by comparing the conversion measurements, in a
temperature range of 350-450°C with Pd-membranes of 20µm thick. The influence of reaction
pressure and gas hourly space velocity (GHSV), varying from 7.0 to 11.0 bar and from 3450 to
14,000 h
-1 respectively, was studied. In addition, various steam to carbon feed molar ratio and
mixtures in different feed concentration were supplied to the MR.


Keywords