CO catalytic synthesis of diethyl carbonate in vapor phase had been studied in the continuous flow system and a fixed-bed reactor.The study reveals that the catalyst activity for diethyl carbonate was influenced by the following factors such as the palladium catalyst supported on the different active carbon,the impregnation method of the catalyst and the different catalyst components;and then a promising catalyst was obtained with the materials of bigger surface area and the method of getting smaller Palladium crystalline.The XPS spectra imdicdled that atomic Palladium(Pd0)in the catalyst was converted to oxidative sfate(Pd2+)after reaction.
