摘要
采用溶胶-凝胶法制备了SiO_2-CuO复合氧化物,通过X射线衍射（XRD）、扫描电镜（SEM）、N2吸附（BET）等表征手段对试样进行了表征。以石油醚为溶剂,配制500 mg/L（以S计）的苯并噻吩（BT）模拟原料油,以SiO_2-CuO复合氧化物为催化剂,考察了催化剂用量、氧化剂H_2O_2用量、溶剂用量、反应温度、反应时间等因素对脱硫率的影响。研究结果表明,SiO_2-CuO复合氧化物呈片状,粒径在0.5~7.0μm,复合氧化物中的Cu以CuO形式存在,其比表面积低于SiO_2。在原料油10 m L,催化剂0.05 g,氧化剂H2O20.1 m L,乙腈与原料油体积比0.3∶1,反应温度65℃,反应时间60 min等最佳反应条件下,BT脱除率达到64.6%。
The SiO_2-CuO composite oxide is prepared by the sol-gel method,and characterized by X-ray diffraction（ XRD）,scanning electron microscope（ SEM） and N2-adsorption specific surface area measurement（ BET）. The simulated feedstock oil with500 mg / L（ S） benzothiophene is prepared using petroleum ether as solvent. The influences of catalyst dosage,H_2O_2 dosage,solvent dosage,reaction temperature,and reaction time on desulfurization rate are investigated at the presence of SiO_2-CuO composite oxide as catalyst. The results show that the composite oxide is plate-like with particle size among 0. 5-7. 0 μm and the specific surface area is lower than that of SiO_2,the Cu species exhibits as CuO on the surface of silica. Under the optimum conditions of the simulated feedstock oil 10 m L,composite oxide 0. 05 g,30% H_2O_20. 1 m L,volume ratio of acetonitrile to model oil 0. 3 ∶1,raction temperature 65℃,reaction time 60 min,the removing rate of benzothiophene can reach up to 64. 6%.
出处
《能源化工》
2016年第3期11-15,共5页
Energy Chemical Industry
基金
北京化工大学化工资源有效利用国家重点实验室开放课题(CRE2013C304)
塔里木大学校长基金项目(TDZKSS201418)(TDZKSS201310)
