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生物油模型化合物水相重整制氢热力学分析

, PP. 104-110

Keywords: 生物油,水相重整,制氢,热力学分析

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Abstract:

利用Gibbs自由能最小化原理对生物油模型化合物水相重整制氢过程进行了热力学平衡计算,考察了反应温度为340~660K、压力比psys/pH2O为0.1~2.0时两个变量对H2选择性、CH4选择性、积碳以及原料转化率的影响。计算结果表明,当体系存在甲烷化与积碳反应时,原料转化率大于99.99%且无固态碳生成,但甲烷化较制氢反应热力学更有利。限制甲烷化反应后可提高H2选择性,其产氢机理主要为原料的直接裂解反应,且1mol甲醇、乙酸与乙二醇可分别生成约0.999、1.940、1.999mol的固态碳。同时限制甲烷化反应和积碳反应,在反应温度500K、压力比psys/pH2O为1.1时,水相重整甲醇、乙酸、乙二醇可得到H2选择性为74.98%、66.64%、71.38%,且3种原料转化率均大于99%。

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