合成气一步法制二甲醚的动力学研究

采用固定床积分反应器，研究了用浸渍法制备的CuO-ZnO/Y-zeolite双功能催化剂上CO加氢直接合成二甲醚的反应动力学，按一氧化碳加氢先合成甲醇，再由甲醇脱水生成二甲醚两步串联的反应机理，分别建立了动力学模型，并对该催化剂对甲醇合成及甲醇脱水的机理作了探讨。模型的计算值和实验值能较好吻合，两步反应的表观活化能分别为27．98kJ/mol和30.62kJ/mol。

Study on the kinetics of dimethyl ether one-step synthesis from syngas

The kinetics for one step synthesis of dimethyl ether from syngas over CuO ZnO/Y zeolite catalysts was studied in a fixed bed reactor. Assuming the reaction includes two steps: methanol synthesis from syngas is the first step and followed by methanol dehydration to produce dimethyl ether. The reaction mechanism models were established and the reaction mechanisms of methanol synthesis and methanol dehydration over the bi functional catalyst were discussed in this paper. The data calculated by the mechanism models are consistent with the experiments and the apparent activation energies of the two steps are 27.98 kJ/mol and 30.62 kJ/mol, respectively.