论文部分内容阅读
The effect of initial water content on the synthesis of silicalite-1 zeolite and its reaction performance in methanol to propylene (MTP) reaction was comprehensively investigated. The as-synthesized samples were characterized by XRD, N2adsorption and desorption, SEM, and FTIR techniques, and studied for the methanol to propylene (MTP) reaction. The results showed that the initial water content played a crucial role on the particle size and porous structure of the silicalite-1 zeolites. It was found that adding initial water to reach a certain amount, the crystal size reduced obviously and the mesoporous structure appeared. Upon applying the silicalite-1 zeolite samples in the MTP reaction, they showed excellent catalytic performance to reach a highest propene mass yield of 26.81% (on the CH2basis) and a P/E ratio of 6.28 in 2 h. The excellent catalytic performance of silicalite-1 can be attributed to its mesoporous structure.