NiO/γ-Al_2O_3吸附剂表面的噻吩反应吸附性能研究

Reactive Adsorption of Thiophene on NiO/γ-Al_2O_3 Adsorbent

以γ-Al2O3为载体,通过等体积浸渍法制备了负载型NiO/γ-Al2O3吸附剂,对含噻吩的模拟汽油进行反应吸附脱硫,考察了NiO负载量、模拟汽油硫含量及活性组分的形态对反应吸附脱硫性能的影响,用XRD、BET比表面积分析、SEM-EDS等分析方法对吸附剂进行了表征。实验结果表明:NiO负载量16(wt)%时达到单层分散,其穿透硫容5.767mg/g,随NiO负载量的增加,穿透时间逐渐增长,穿透硫容逐渐增加,结晶态NiO的出现对反应不利;模拟汽油硫含量变化对吸附剂的穿透硫容影响较小;吸附剂还原前后对噻吩的反应脱除效果基本相同。

NiO/γ-Al2O3 adsorbent was prepared by wet impregnated method.Reactive adsorption desulfurization of model gasoline with thiophene was conducted.The influence of loading content of NiO,sulfur concentration of model gasoline and the status of active particles on the reactive adsorption desulfurization of model gasoline were investigated.XRD,BET and SEM-EDS techniques were used to characterize the adsorbents.The results showed that monolayer dispersion amount of NiO is 16（wt）%,and the breakthrough sulfur capacity was 5.767 mg/g.With the increasing of loading content of NiO,breakthrough adsorption time and sulfur capacity both increase,crystalline NiO was disbenefit to reactive adsorption.Sulfur concentration of model gasoline had small influence on breakthrough sulfur capacity,before and after reduction,NiO/γ-Al2O3 adsorbent had the same effect on removing of thiophene.