甲醇直接气相羰基化反应动力学

A novel heterogeneous sulfided Mo/C catalyst was used for the direct vapor phase carbonylation of methanol Experiments were designed with the elimination of mass transfer resistances to obtain data The data of primary reactions in the carbonylation were collected via a differential tubular reactor Feed composition was varied to examine the effect of partial pressures of reactants on the reaction rate Power law rate models were employed to express the conversion of methanol and the formations of methyl acetate and methane Adequate results were obtained with the models to represent the experimental data The reaction orders of methyl acetate formation with respect to methanol and CO were found to be 1 2 and 0 35 respectively on the novel Mo/C catalyst, and the reaction activation energy was 106?kJ/mol At the same time, the reaction mechanism of direct vapor phase carbonylation of methanol was presented The initial step of this reaction was suggested to be the cleavage of methanol to form CH + 3 M, followed by adsorbed CO insertion into the metal methyl bond to form CH 3C(O) + M, which further interacts with methanol to form methyl acetate