钛硅分子筛/H 2O 2体系催化汽油氧化脱硫

在钛硅分子筛/H2O2催化氧化体系下,研究了在固定床反应器上低温常压下真实汽油中硫化物的催化氧化脱除.研究结果表明,钛硅分子筛TS-1催化剂的晶粒大小对其催化氧化脱硫性能有影响,TS-1催化剂晶粒越小,催化氧化脱硫性能越高.催化剂吸附研究表明,银物种对噻吩有很强的选择吸附能力,银改性能提高TS-1催化剂的催化氧化脱硫性能.用孔径较大的含钛分子筛代替TS-1,催化剂催化氧化脱除较大分子硫化物的性能提高.汽油催化氧化脱硫处理后族组成和辛烷值没有明显变化.

Oxidative desulfurization of gasoline using hydrogen peroxide over titanium silicalite molecular sieves

The oxidative desulfurization of gasoline using hydrogen peroxide over titanium silicalite was studied in the fixed-bed reactor and under mild reaction conditions. The results show that the crystal size of TS-1 has a great effect on its performance and desulfurization rate will increase with the decrease of crystal size. Catalyst absorption experiment shows that silver can absorb sulfur-containing compounds selectively, so silver modification will improve the performance of catalyst in desulfurization. Desulfurization is also enhanced when using other titanium-containing catalyst with larger pore size instead of TS-1. The components and RON of gasoline have scarcely any change after oxidative desulfurization.