二甲醚水蒸气重整催化剂的研究

Study on the catalysts for dimethyl ether steam reforming

采用二甲醚水解活性组分与甲醇重整活性组分机械混合的方式,制备了一系列二甲醚水蒸气重整(DMESR)双功能催化剂。分别考察了不同二甲醚水解活性组分和甲醇重整活性组分对催化性能的影响,活性测试结果表明,γ-Al2O3是最佳二甲醚水解活性组分,CuMn复合氧化物是最佳甲醇重整活性组分。两者按适当比例混合而成的CuMn/γ-Al2O3双功能催化剂具有较好的DMESR综合性能,且其最佳反应温度为350℃。在常压、350℃时,DME转化率为98.1%,H2选择性为97.5%,H2收率95.6%。

A series of bi-functional catalysts for dimethyl ether （DME） steam reforming were prepared by mixing the components for methanol reforming and the components for DME hydrolysis. The influences of different hydrolysis components and reforming components on the catalytic performances were investigated. The results showed that the optimum DME hydrolysis component and methanol reforming component were the γ-Al2O3 and the CuMn composite oxides, respectively, and both of them were mixed in ap- propriate proportion to obtain the CuMn/γ-Al2O3 bi-functional catalyst with the preferable performances of DME steam reforming, and DME conversion of 98.1%, hydrogen selectivity of 97.5%, and hydrogen yield of 95.6% were achieved over the optimized CuMn/γ-Al2O3 catalyst at atmospheric pressure and the optimum reaction temperature of 350℃.