关键词: 类固相法, 喷雾吸附, ZSM-5, 片层形貌

Abstract: ZSM-5 zeolite with lamellar morphology was synthesized by solid-like phase method at H2O/SiO2 molar ratio of 0.5-1.0. The uniform mixing for solid and solution was realized using high pressure spray-adsorption method and the influence of the synthetic conditions on the properties of prepared ZSM-5 were investigated as well. This synthetic method solved the problem in low water content system where the solid and liquid were hard to mix uniformly. The results show that the ZSM-5 grain is in the form of irregular, rough and lamellar morphology. The synthesized ZSM-5 with a hierarchical pore structure has a surface area 405 m2/g and a pore volume of 0.37 cm3/g. The ZSM-5 can be synthesized in the 0.03-0.13 Na2O/SiO2 ratio range. The crystallinity reaches to 112% at the P/SiO2 ratio of 0.036 and the crystallization time of 20 h. It is found that water is in the form of vapor and has a function of heat transfer during the synthesis process. The synthesized ZSM-5 has an outstanding hydroisomerization performance for diesel isodewaxing. The diesel yield reaches to 95.50 % with a condensation point of -35 ℃.

Key words: solid-like phase method, spray-adsorption, ZSM-5, lamellar morphology