CAJ | 학술논문

制备了以γ-Al2 O3为载体的Ni-Mo催化剂,并用于FCC汽油的加氢硫转移反应。对Ni-Mo/Al2 O3催化剂上的硫转移反应机理进行了研究,考察了不同反应条件对硫转移反应的影响。实验结果表明,硫醇与烯烃的反应在催化剂表面的加氢活性位上进行,小分子的硫醇发生加氢脱硫,生成吸附态H2 S,吸附态的H2 S与烯烃反应,生成大分子硫醇和硫醚；另外小分子硫醇还可直接与烯烃发生反应,生成硫醚。提高反应温度、压力、氢油比或降低空速,均可提高催化剂的硫转移反应活性,轻质硫转化率得到明显提高,且单烯选择性还能维持在98%左右。
제비료이γ-Al2 O3위재체적Ni-Mo최화제,병용우FCC기유적가경류전이반응。대Ni-Mo/Al2 O3최화제상적류전이반응궤리진행료연구,고찰료불동반응조건대류전이반응적영향。실험결과표명,류순여희경적반응재최화제표면적가경활성위상진행,소분자적류순발생가경탈류,생성흡부태H2 S,흡부태적H2 S여희경반응,생성대분자류순화류미；령외소분자류순환가직접여희경발생반응,생성류미。제고반응온도、압력、경유비혹강저공속,균가제고최화제적류전이반응활성,경질류전화솔득도명현제고,차단희선택성환능유지재98%좌우。
The bimetal Ni-Mo catalysts supported on γ-Al2 O3 were prepared and used for the selective hydrogenation of FCC gasoline for sulfur transfer. The reaction mechanism of sulfur transfer on Ni-Mo/Al2 O3 catalyst was studied and the influence of reaction conditions on sulfur transfer was investigated. The results showed that the reaction of thiol and olefin happened on the active sites of hydrogenation on catalyst surface. Hydrodesulfurization of small molecule thiol firstly produced adsorbed hydrogen sulfide, then the adsorbed hydrogen sulfide reacted with adsorbed olefin and formed macromolecular thiol or thioether; Besides, small molecule thiol can also directly reacted with olefins to produce thioether. The activity of sulfur transfer reaction of Ni-Mo/Al2 O3 catalyst was improved through the increase of reaction temperature, pressure, and H2/oil ratio or the decrease of LHSV. The conversion of light sulfur compounds was obviously improved, and mono-olefins selectivity was maintained at around 98%.