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標題: Heat transfer effects on the methanol-steam reforming with partially filled catalyst layers
作者: Chein, R.Y.
Chen, L.C.
Chen, Y.C.
Chung, J.N.
關鍵字: Methanol-steam reforming (MSR);Wall-coated reformer;Packed-bed;reformer;Catalyst layer and heat transfer;fuel-cell applications;hydrogen-production;membrane reactor;forced-convection;porous-medium;small pemfc;packed-bed;microreactor;cu/zno/al2o3;simulation
Project: International Journal of Hydrogen Energy
期刊/報告no:: International Journal of Hydrogen Energy, Volume 34, Issue 13, Page(s) 5398-5408.
The heat transfer effects on a methanol-steam reforming (MSR) process are numerically investigated using a circular reformer with a partially (referred to as the wall-coated reformer) or entirely filled catalyst layer (referred to as the packed-bed reformer). The catalyst layer is formed by packing CuO/ZnO/Al(2)O(3) catalyst particles with a certain porosity and permeability. The fluid flow characteristics are strongly affected by the catalyst-layer thickness. As a consequence, the heat and mass transfer also depend on the catalyst-layer thickness. Under heat supplied by wall heat flux conditions, it is found that higher reforming temperature can be obtained for the wall-coated reformer compared with the packed-bed reformer. This results in the wall-coated reformer having a better methanol conversion efficiency compared with the packed-bed reformer. Based on our study, the minimum heat transfer coefficient, maximum methanol conversion and maximum carbon monoxide production are obtained when the catalyst-layer thickness is 90% of the reformer radius. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2009.04.049
Appears in Collections:機械工程學系所

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