【摘要】 在SAPO-34分子筛催化剂上,对甲醇制烯烃(MTO)的反应现象进行了考察,结果证实MTO反应存在明显的反应诱导期和催化剂积炭失活期。基于此,在653.15~763.15 K、甲醇空速3~27 h-1的条件下,借助集总动力学的概念,使用固定床等温积分反应器进行了MTO反应本征动力学。建立的动力学常微分方程采用Runge-Kutta法求解后,以含氧化物集总(MDOH)转化率的计算值与目标值的残差平方和为目标函数,使用Levenberg-Marquardt最优化方法对含氧化物转化速率方程进行参数拟合,并根据各产物集总的生成规律得出5个产物集总的生成速率动力学方程。经统计检验,文中建立的动力学模型对MTO反应主产物乙烯、丙烯和丁烯的预测结果令人满意。更多还原

【Abstract】 Based on the SAPO-34 catalyst,the phenomena of methanol-to-olefin（MTO） reaction are investigated.The results confirm the existance of both the induction and carbon deposition periods in this reaction.With the help of lumping kinetics theory,the intrinsic reaction kinetics for MTO reaction is obtained in the integral fixed-bed reactor at 613.15—763.15 K and space velocity of 3—27 h^-1.The ordinary differential function is resolved by Runge-Kutta method,while the model parameters are estimated by Levenberg-Marquardt optimization method.The kinetic model is proved to be satisfactory after statistical tests.更多还原