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为了获得性能优良的甲醇分解催化剂,用固定床流动反应装置研究了在M/Al_2O_3、Rh,M/Al_2O_3、M,K/Al_2O_3和Rh,M,K/Al_2O_3(M是贱金属元素)系催化剂上甲醇反应时的转化率和产物分布。 不含钾的催化剂上甲醇转化率高,脱水是主反应;Rh虽可提高催化剂的甲醇分解选样性,但生成副产物甲烷。在含2mg·atom/g·Al_2O_3钾的催化剂上,甲醇脱水反应受抑制,几乎只有分解反应。Ni,K/Al_2O_3催化剂上甲醇的反应性和选择性能优良,它可与Rh,Ni,K/Al_2O_3催化剂相当,有希望开发成不含贵金属的实用甲醇分解催化剂体系。
In order to obtain a good performance methanolysis catalyst, a series of catalysts were studied in a fixed-bed flow reactor using M / Al_2O_3, Rh, M / Al_2O_3, M, K / Al_2O_3 and Rh, M, K / Al_2O_3 Methanol conversion reaction and product distribution. Methanol conversion on potassium-free catalysts is high, and dehydration is the main reaction. Although Rh can improve the methanolysis selectivity of the catalysts, it produces by-product methane. On the catalyst containing 2mg · atom / g · Al_2O_3 potassium, the dehydration reaction of methanol is inhibited, almost only the decomposition reaction. The reactivity and selectivity of methanol on Ni / K / Al 2 O 3 catalyst are good, which are comparable to that of Rh, Ni and K / Al 2 O 3 catalysts and promising to be developed into practical methanolysis catalyst system without precious metal.