【摘要】 乙炔和醋酸合成醋酸乙烯的反应过程中 ,催化剂的失活 ,是由催化剂中的醋酸锌Zn (OAc) 2 从活性炭表面上升华到气相中以及被凝聚物堵在微孔内部而引起的 .升华机理是反应产物与Zn (OAc) 2作用生成挥发性络合物再升华到气相中去 .总流失速度可用LR =1-exp (-kvt)来描述 ,这是升华速度方程式的应用推广 .式中v为气流速度 ,t为反应时间 ,k为速度常数更多还原

【Abstract】 In the reaction process of synthesizing vinyl acetate, the loss of the active species Zn(OAc) 2 from the surface of activated carbon results from Zn(OAc) 2 sublimating of gas phase and the blocking inside micropores with condensation products. The sublimation mechanism is that the reaction product vinyl acetate acts with Zn(OAc) 2 to produce a volatilizable complex, then sublimates to gas phase. The overall loss ratio( LR ) can be described as the equation LR =1-exp(- kvt ), which is extensive application of the sublimation rate equation, where v is the flow rate of gas stream, t is reaction time, and k is loss rate constant.更多还原