采用等体积浸渍法和湿混法制备NiO/ZnO-SiO2-Al2 O3吸附剂前体,经还原得到Ni/ZnO-SiO2Al2 O3吸附剂.利用XRD和压汞法对其晶体结构进行表征,采用固定床吸附实验评价吸附剂对加氢汽油的吸附脱硫性能.结果表明,与等体积浸渍法制备的吸附剂前体相比,湿混法制备的吸附剂前体的比表面积大,孔体积相当,还原后所得吸附剂的脱硫活性好.以山东恒源石化公司的加氢汽油为原料,在吸附温度350℃、压力2.0 MPa、进料液时体积空速7h-1、氢气与溶剂油体积比60的条件下,可以将加氢汽油中的硫质量分数从69μg/g降至10 μg/g以下,而汽油RON仅降低0.6个单位,硫容量(w)约为9.98％.该吸附剂对原料有很好的适应性,可再生,多次循环使用后脱硫性能基本不变.%Ni/ZnO-SiO2-Al2O3 adsorbents were prepared by impregnation and wet mixing methods,respectively.XRD and mercury porosimeter were adopted to characterize the crystal structure of the adsorbents.A fixed bed reactor was used to investigate the desulfurization performance of hydrogasoline with different adsorbents.The results show that the adsorbents prepared by wet mixing method have a higher special surface area and similar pore volume and better desulfurization performance compared with the adsorbents prepared by impregnation method.The desulfurization experiment using the hydrogasoline from Shandong Hengyuan Petrochemical Company as feed indicates that the content of sulfur is decreased from 69 μg/g to 10 μg/g,while the octane number of the gasoline produced decreases by only 0.6 and the sulfur capacity of the adsorbent is up to 9.98％ at the conditions of 350 ℃,2.0 MPa,LHSV of 7.0 h-1,hydrogen to gasoline volume ratio of 60 ∶ 1.The adsorbent has a good adaptability to various hydrogasolines.The desulfurization performance of the adsorbent regenerated for 3 times is the same as that of the fresh one.
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