International Journal of Hydrogen Energy, Vol.45, No.20, 11438-11448, 2020
Numerical and experimental study on hydrogen production via dimethyl ether steam reforming
This work presents the characteristics of catalytic dimethyl ether (DME)/steam reforming based on a Cu-Zn/gamma-Al2O3 catalyst for hydrogen production. A kinetic model for a reformer that operates at low temperature (200 degrees C-500 degrees C) is simulated using COMSOL 5.2 software. Experimental verification is performed to examine the critical parameters for the reforming process. During the experiment, superior Cu-Zn/gamma-Al(2)O(3)catalysts are manufactured using the sol-gel method, and ceramic honeycombs coated with this catalyst (1.77 g on each honeycomb, five honeycombs in the reactor) are utilized as catalyst bed in the reformer to enhance performance. The steam, DME mass ratio is stabilized at 3:1 using a mass flow controller (MFC) and a generator. The hydrogen production rate can be significantly affected depending on the reactant's mass flow rate and temperature. And the maximum hydrogen yield can reach 90% at 400 degrees C. Maximum 8% error for the hydrogen yield is achieved between modeling and experimental results. These experiments can be further explored for directly feeding hydrogen to proton exchange membrane fuel cell (PEMFC) under the load variations. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.