The role of ash layer in syngas combustion in underground coal gasification
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- 作者：Xi Lin ; Qingya Liu ; Zhenyu Liu ; liuzy@mail.buct.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Xiaojin Guo ; Renxing Wang ; Lei Shi
- 关键词：Ash layer ; Underground coal gasification ; Syngas combustion ; Ash melting
- 刊名：Fuel Processing Technology
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：143
- 期：Complete
- 页码：169-175
- 全文大小：1527 K
文摘
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An assembly is designed to study one-dimension gasification of a coal char.
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The ash layer provides a space for reaction of O2 + CO and increases CO2 yield.
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The CO combustion in ash layer raises temperature and leads to ash melting.
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The molten ash increases the mass transfer resistance of the gas components and decreases the gasification rate.