activated carbon;  vinyl acetate synthesis;  catalyst inactivation;  Zinc acetate

During the reaction of acetylene and acetic acid to synthesize vinyl acetate, the inactivation of the catalyst is caused by the sublimation of zinc acetate Zn (OAc)2 in the catalyst from the surface of activated carbon into the gas phase and the blockage of the condensate in the micropores. The sublimation mechanism is that the reaction product reacts with Zn (OAc)2 to form volatile complexes, which are then sublimated into the gas phase. The total loss velocity can be described by LR=1-exp (-kvt), which is the application generalization of the sublimation velocity equation. where v is the velocity of the airflow, t is the reaction time, and k is the velocity constant.