Abstract

Coal is the dominant composition of fossil fuel but, with the accompanying gaseous products, causes environmental pollution. Here, we report a methodology to improve C conversion in co-gasification. The steam gasification and chemical looping gasification (CLG) of lignite and rice husk with oxygen uncoupling over 5% NiO/CuO oxygen carrier were conducted by non-isothermal kinetics method in a fixed-bed reactor. The gasification results showed that the yields of gas products in CLG of lignite or rice husk are higher than that in steam gasification. The yields of gases in chemical looping co-gasification (CLCG) are higher than that in steam co-gasification. In the co-gasification, the complementation of reactivity between fuels facilitated the C conversion rate, so the yields in co-gasification were higher than in individual gasification. The C conversion in CLCG of lignite and rice husk is 14.51% higher than that in steam co-gasification.

中文翻译：

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Cu-Ni氧载体褐煤与稻壳化学链式共气化研究

摘要

煤是化石燃料的主要成分，但伴随着气体产物，会造成环境污染。在这里，我们报告了一种提高共气化中 C 转化率的方法。在固定床反应器中采用非等温动力学方法对褐煤和稻壳在 5% NiO/CuO 载氧体上进行氧解偶联的蒸汽气化和化学链气化 (CLG)。气化结果表明，褐煤或稻壳CLG气化产物的产率高于蒸汽气化。化学循环共气化（CLCG）的气体产率高于蒸汽共气化。在共气化中，燃料之间反应性的互补促进了C的转化率，因此共气化的产率高于单独气化的产率。