Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/45034
標題: Heat transfer effects on the methanol-steam reforming with partially filled catalyst layers
作者: Chein, R.Y.
簡瑞與
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
期刊/報告no:: International Journal of Hydrogen Energy, Volume 34, Issue 13, Page(s) 5398-5408.
摘要: 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.
URI: http://hdl.handle.net/11455/45034
ISSN: 0360-3199
文章連結: http://dx.doi.org/10.1016/j.ijhydene.2009.04.049
Appears in Collections:機械工程學系所

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.