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采用积分反应器 ,考察了常压下在改性高岭土 (MK)催化剂上甲醇脱水生成二甲醚的反应动力学 ,根据L angmuir均匀吸附理论 ,采用 R- E机理 ,推断吸附的甲醇分子与气相主体中的甲醇分子发生的表面反应为速率控制步骤 (RDS) ,得到双曲线型动力学方程为 :r=ksb Mp M2 /(1 +b Mp M+bp E) (r为反应速率 ,ks为反应速率常数 ,b M 为甲醇的吸附平衡常数 ,b为二甲醚和水的吸附平衡常数之和 ,p M、p E 分别为甲醇、二甲醚的分压 ) .在 MK上 ,表面反应的活化能为 79.1 k J/mol.数据处理和参数确定均用最小二乘回归法 .
The reaction kinetics of dehydration of methanol to DME under normal pressure was investigated using an integral reactor. According to L angmuir theory of uniform adsorption and the mechanism of R-E, the adsorption of methanol molecules and gas phase The surface reaction of the methanol molecule in the host is the rate control step (RDS), resulting in a hyperbolic kinetic equation of r = ksb Mp M2 / (1 + b Mp M + bp E) where r is the reaction rate and ks is B M is the adsorption equilibrium constant of methanol, b is the sum of the adsorption equilibrium constants of dimethyl ether and water, and p M and p E are the partial pressures of methanol and dimethyl ether, respectively.) On MK, the surface reaction The activation energy was 79.1 kJ / mol. Data processing and parameter determination were performed using least squares regression.