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Synthesis and Catalytic Oxidative Desulfurization Properties of Tungsten-containing Mesoporous Material SBA-15

Yan Xuemin Mi Yuanzhu Gao Lin Su Gaoshen (College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023)  
Tungsten-containing mesoporous molecular sieves W-SBA-15 was synthesized by conventional hydrothermal method using Na_2WO_4 as tungsten source and tetraethyl orthosilicate as silicon source.W-SBA -15 was characterized by XRD,TEM,N_2 adsorption-desorption,FT-IR and UV-Vis methods.The results showed that the tungsten in gel solution could be effectively incorporated into SBA-15 and the tungsten species in W-SBA-15 were highly dispersed.The BET surface area and pore volume of W-SBA-15 were 628 m~2/g and 0.93 cm~3/g respectively.The mean BJH pore diameter was 4.3 nm,with very sharp pore size distribution.An oxidative desulfurization process of refractory sulfur compounds has been investigated using W -SBA-15 as catalyst and H_2O_2 as the oxidizing agent.W-SBA-15 showed high catalytic activity and reusability, and the reactivity order of these sulfur compounds was DBT4,6-DMDBTBT.
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