在Cu—ZnO/SiO_2催化剂上甲醇脱氢合成甲酸甲酯的反应动力学

STUDY ON THE REACTION KINETICS OF DEHYDROGENATION OF METHANOL TO METHYL FORMATE OVER Cu-ZnO/SiO_2 CATALYST

用微反－色谱装置研究在Cu-ZnO/SiO2催化剂上甲醇脱氢合成甲酸甲酯的反应动力学，结果表明：在甲醇分压为50－101kPa范围内，该脱氢反应速率方程式为零级动力学方程，表观活化能E表等于87．6kJ/mol，指前因子A等于4．55×10^5 ,对于反应机理作了讨论，并推导出了反应动力学方程，理论结果和实验结果一致。

The reaction kinetics of dehydrogenation of methanol over Cu-ZnO/SiO_2 catalyst under atmospheric pressure has been studied. The results indicate that the reaction is of zero-order kinetics when the partial pressure of methanol is within the range from 50 to 101 kPa. The observed activation energy Ea is equal to 87.6 kJ/mol, the pre-exponential factor A is equal to 4.55×10~5. A mechanism for the reaction is proposed and the reaction rate equation has been derived. The theoretical results are in agreement with the experimental results.