摘要
以1-丁基-3-甲基咪唑磷钨酸盐离子液体为钨源,正硅酸四乙酯为硅源,通过溶胶-凝胶法合成了WO_3-SiO_2,并用Raman、XRD、TEM对其结构组成进行了表征。在WO_3-SiO_2作催化剂、乙腈作萃取剂、H_2O_2作氧化剂的催化氧化脱硫系统内,考察了催化剂对模拟油中二苯并噻吩(DBT)的脱除效果。结果表明,W组分被负载进入无定形SiO_2载体上,并以单斜相WO_3的形式存在。在n(W)∶n(Si)=0.1、n(O)∶n(S)=3、m(WO_3-SiO_2)=0.03 g、T=50℃的最佳实验条件下,WO_3-SiO_2对模拟油中DBT的脱除率可达94.73%。
WO3-SiO2 nanoparticles are synthesized via a sol-gel method using 1-butyl-3-methylimidazolium phosphotungstate ionic liquid and ethyl orthosilicate as sources of tungsten and silicon respectively. Subsequently,the composition and structure of prepared WO3-SiO2 catalysts are characterized by Raman,XRD and TEM. The removal efficiency of dibenzothiophene（ DBT） from model oil by as-prepared catalyst is explored in the catalytic oxidative desulfurization system with WO3-SiO2 as catalysts,acetonitrile as extraction agent and H2O2 as oxidant.The results show that W species have been imbedded in amorphous SiO2 supporters in the form of monoclinic WO3. The removal rate of DBT by WO3-SiO2 can reach 94. 73% under the optimal experimental conditions of n（ W） ∶ n（ Si） = 0. 1,n（ O） ∶ n（ S） =3,m（ WO3-SiO2） = 0. 03 g and T= 50℃.
作者
徐竞帆
李爱蓉
蒋乐乐
XU Jing-fan;LI Ai-rong;JIANG Le-le(College of Chemistry ＆ Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China)
出处
《现代化工》
CAS
CSCD
北大核心
2018年第4期105-109,共5页
Modern Chemical Industry
基金
四川省科技创新苗子工程(项目编号:20160811)
