WO3-ZSM-5/MCM-41催化剂的合成及其催化氧化脱硫研究

以氢氧化钠溶液处理微孔沸石ZSM-5来提供硅铝源，合成了ZSM-5/MCM-41复合结构型分子筛。采用XRD、N2吸附脱附、TEM等方法对其进行了表征，考察了其水热稳定性。实验结果表明，碱处理合成的ZSM-5/MCM-41同时具有微孔孔道和介孔孔道结构，并具有优于介孔MCM-41分子筛的水热稳定性。以ZSM-5/MCM-41为载体负载三氧化钨后应用于噻吩/正辛烷模拟油体系，双氧水为氧化剂，催化氧化脱硫，WO3-ZSM-5/MCM-41（三氧化钨质量分数为10%）表现出良好的催化性能，脱硫率可达到93.6%。

Preparation and catalytic oxidation desulphurization performance of WO3-ZSM-5/MCM-41 catalyst

A new micro-mesoporous ZSM-5/MCM-41 was prepared with ZSM-5 zeolite（treated in NaOH solution） as thesource of silicon.The ZSM-5/MCM-41 was characterized by XRD，TEM，and N2 adsorption and desorption.In addition，its hydrothermal stability was investigated.The results showed that the composite molecular sieve ZSM-5/MCM-41 had the structure of both microporous ZSM-5 and mesoporous MCM-41，and had the stronger hydrothermal stability than the mesoporous molecular sieve MCM-41.Applied to thiophene/octane model oil system，after loading 10% mass fraction of WO3，the WO3-ZSM-5/MCM-41（mass fraction of 10%） showed good catalytic performance when the oxidant was H2O2，and the desulfurization rate could reach 93.6%.