Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/69392
標題: Axial heat conduction and heat supply effects on methanol-steam reforming performance in micro-scale reformers
作者: Chein, R.Y.
Chen, Y.C.
Chung, J.N.
關鍵字: Methanol-steam reforming (MSR)
Microscale tubular reformer
Heat
supply
Axial conduction parameter
hydrogen-production
cu/zno/al2o3 catalyst
microchannel reactor
fuel-cells
packed-bed
microreactor
combustor
exchangers
simulation
microtube
期刊/報告no:: International Journal of Heat and Mass Transfer, Volume 55, Issue 11-12, Page(s) 3029-3042.
摘要: The methanol-steam reforming (MSR) performance in micro-scale tubular reformers made by various materials is numerically studied. The physical domain considered includes an inlet section for methanol-steam mixture supply, a reformer section packed with CuO/ZnO/Al2O3 catalyst particles and an outlet section for reformed gas collection. The heat transfer effect with three different heat supply mechanisms on the MSR performance is addressed. For heat supplies from the applied heat fluxes at the reformer outer wall surface and from internal heat generation in the reformer wall, it is found that the axial conduction plays an important role in both heat transfer characteristics and MSR performance. It is suggested that the reformer have a small axial conduction parameter for high MSR performance which can be achieved by designing the reformer with low wall thermal conductivity, thin wall thickness and a small reactants feed rate. It is also found that an excess heat supply can be obtained when the axial conduction parameter is small. This excess heat supply enhances the MSR performance compared with the infinitely-thin walled reformer. For the reformer with a constant wall outer surface temperature, the wall material effect on the MSR performance is insignificant due to uniformly distributed reformer wall temperature. (C) 2012 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/11455/69392
ISSN: 0017-9310
文章連結: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.02.022
Appears in Collections:期刊論文

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.