磷钨酸改性介孔材料HPW-HMS在汽油脱硫中的应用

Oxidative desulfurization of gasoline using hydrogen peroxide over modified mesoporous material HMS by phosphotungstic acid

以正十二胺为模板剂,正硅酸四乙酯为硅源,磷钨酸(HPW)为活性组分,采用一锅法制备了磷钨酸改性的介孔材料HPW-HMS。以30%双氧水为氧源,探索HPW-HMS催化剂对汽油氧化脱硫的效果。结果表明,当磷钨酸和正硅酸四乙酯摩尔比为0.02,催化剂质量0.2 g,反应温度为55℃,反应12 h,双氧水2.5 mL时,脱硫效果达到68.3%,催化剂重复使用4次依然有良好的催化效果。

The modified mesoporous material HMS （HPW-HMS）was prepared by one-pot process using phosphotungstic acid（HPW） as active component,neutral dodecylamine （DDA） as templating agent,tetraethyl orthosilicate（TEOS）as silicon source.30％ H2O2 as oxidant explore HPW-HMS catalyst on the effect of oxidative desulfurization of gasoline.The result showed that the optimized conditions was as follows：the mole ratio of HPW with TEOS 0.02,amount catalyst of 0.2 g,reaction temperature 55 ℃,reaction time of 12 h,volume of hydrogen peroxide with 2.5 mL,the desulfurization rate is 68.3％,the catalyst that was reused more than four times still has better catalytic effects.