摘要
以非离子表面活性剂span-40为改性剂在乙醇中对合成的纳米TiO2进行了表面改性,利用傅里叶红外光谱进行了表征,并研究了其在水/油两相系统中光催化氧化催化裂化汽油脱硫情况。结果表明,纳米TiO2表面有span-40存在,并能稳定悬浮存在于油相中;在水/油体积比为1∶1、亲油性纳米TiO2加入量为1 g/L的条件下,以500 W高压汞灯为光源照射2 h后,催化裂化(FCC)汽油的脱硫率为92.8%;光催化氧化FCC汽油脱硫为一级动力学反应,反应速率常数为1.3289 h-1,半衰期为0.52 h。
TiO_2 nanoparticles was prepared via sol-gel process and then modified by span-40 in ethanol.The result obtained by FT-IR shows that there is span-40 on the surface of TiO_2 nanoparticles.And photocatalytic oxidative desulfurization of fluid catalytic cracking(FCC) gasoline in oil-water extraction system using modified TiO_2 as photocatalyst was studied.A 500 W high pressure Hg lamp was used as the UV-light source for irradiation.Desulfurization rate of FCC gasoline can reach 92.8% after 2 h under the conditions of V(H_2O)∶V(FCC gasoline)=1∶1 and amount of modified TiO_2 at 1 g/L in reaction system.And under such conditions the photochemical oxidative desulfurization kinetics of FCC gasoline is the first-order with apparent rate constant of 1.3289 h^(-1) and half-time of 0.52 h.
出处
《现代化工》
CAS
CSCD
北大核心
2006年第z2期157-159,共3页
Modern Chemical Industry
基金
国家自然科学基金项目(20276015)
河北省自然科学基金项目(203364)
关键词
纳米
TiO2
表面改性
光催化氧化
催化裂化汽油
脱硫
TiO_2 nanoparticles
surface modification
photocatalytic oxidative
FCC gasoline
desulfurization
