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化工学报  2015 

褐煤热解-气化-制油系统的CO2减排策略

DOI: 10.11949/j.issn.0438-1157.20150795, PP. 3204-3209

Keywords: 褐煤,热解,气化,制油过程系统,流程模拟,CO2

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Abstract:

褐煤热解-气化-制油系统是现代煤化工发展的一个重要研究内容。来自系统多个单元产生的CH4和CO2如果发生重整反应,将重整得到H2/CO比值较高的合成气添加到制油流程中,可实现更多的C被固定到产品中而减少CO2的直接排放量。对CH4-CO2和CH4-H2O两种重整反应方式、来自煤热解和费托合成两股甲烷气和典型的干粉气化和水煤浆气化两种流程进行了组合研究。分析结果显示,来自热解和费托合成的甲烷重整后不足以提供调节合成气H2/CO比例所需的氢气,水煤气变换反应对于褐煤制油系统来说是必需的。从C转化成油的角度来看,采用干粉气化和CH4-H2O重整的方案是较好的选择。

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