Hydrogen production by steam-gasification of petroleum coke using concentrated solar power - III. Reactor experimentation with slurry feeding

被引：84
|
作者：
Z'Graggen, A.
Haueter, P.
Maag, G.
Vidal, A.
Romero, M.
Steinfeld, A. [1 ]
机构：
[1] ETH, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland
[2] CIEMAT, E-28040 Madrid, Spain
[3] Paul Scherrer Inst, Solar Technol Lab, CH-5232 Villigen, Switzerland
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2007年 / 32卷 / 08期
关键词：
solar; gasification; slurry; carbonaceous materials; hydrogen;
D O I：
10.1016/j.ijhydene.2006.10.001
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report on the experimental evaluation of a 5 kW solar chemical reactor for the steam-gasification of petcoke, carried out in a high-flux solar furnace. A petcoke-water slurry was continuously injected into a solar cavity-receiver to create a vortex flow directly exposed to concentrated solar radiation. For a nominal reactor temperature of 1500 K, a water-petcoke molar ratio of 4.8, and a residence time of 2.4 s, the maximum degree of petcoke conversion was 87%. Typical syngas composition produced was 62% H-2, 25% CO, 12% CO2, and 1% CH4. The solar energy conversion efficiency-defined as the portion of solar energy absorbed as chemical energy and sensible heat-attained 17%. The effect of varying the particle size (range 8.5-200 mu m) and slurry stoichiometry (range 2.1-6.3) on the degree of chemical conversion and energy conversion efficiency was examined. (C) 2006 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：992 / 996
页数：5
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