Separation of hydrogen from syngas using a regenerative system

被引：60

作者：

Campen, Adam ^{[2
]}

Mondal, Kanchan ^{[2
]}

Wiltowski, Tomasz ^{[1
,2
]}

机构：

[1] So Illinois Univ, Coal Res Ctr, Carbondale, IL 62901 USA

[2] So Illinois Univ, Dept Mech Engn & Energy Proc, Carbondale, IL 62901 USA

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2008年 / 33卷 / 01期

关键词：

hydrogen; syngas; coal;

D O I：

10.1016/j.ijhydene.2007.07.016

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：

A method of separating hydrogen from syngas for use as a carbon-free energy carrier is reported. The overall process consists of a hydrogen enrichment step and a solids regeneration step in a lab-scale, fixed-bed reactor under atmospheric pressure. During the enrichment step, syngas and steam are passed through iron oxide and calcium oxide beds where multiple reactions occur simultaneously to yield a stream of hydrogen. The syngas and steam feeds are then replaced by air to regenerate the solids, releasing sequestration-ready carbon dioxide. The effects of moderate temperatures (600-800 degrees C), steam concentration, syngas concentration, residence time, and solids composition on hydrogen purity were studied. The information obtained was used to optimize the process and achieve a 99% hydrogen stream. Ten cycles using the same solids were completed with a minimal loss in performance observed. (C) 2007 International Association for Hydrogen Energy.

引用

页码：332 / 339

页数：8

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