ZnO/θ-Al_2O_3催化剂上全馏分FCC汽油的选择性加氢脱硫  

Selective Hydrodesulfurization of Full-Range FCC Gasoline over ZnO/θ-Al_2O_3 Catalyst

作　　者：温广明[1] 王文寿[1] 陈黎行[1] 郭洪臣[1] 王祥生[1] 

机构地区：[1]大连理工大学化工学院催化化学与工程系精细化工国家重点实验室,辽宁大连116012

出　　处：《催化学报》2007年第9期823-828,共6页

基　　金：辽宁省优秀青年科技人才培养基金(2005222010).

摘　　要：研究了三种氧化铝载体和一种ZnO/θ-Al2O3催化剂对全馏分FCC汽油的选择性加氢脱硫性能.结果表明,θ-Al2O3对于全馏分FCC汽油的加氢脱硫选择性因子高于γ-Al2O3和在900℃下焙烧过的γ-Al2O3.负载ZnO能进一步提高θ-Al2O3的加氢脱硫活性和选择性.通过吡啶吸附傅里叶变换红外光谱、氢气程序升温还原和X射线衍射表征发现,θ-Al2O3表面只有微弱的L酸性,其吡啶吸附红外光谱明显不同于其他氧化铝.负载ZnO导致θ-Al2O3载体中出现了尖晶石结构,并且使催化剂的高温H2还原峰位向低温方向移动.The selective hydrodesulfurization performance of three kinds of aluminas and the ZnO/θ-Al2O3 catalyst was studied with full-range FCC gasoline as the feedstock. The selective factor of θ-Al2O3 for the hydrodesulfurization of the full-range fluidized catalytic cracking gasoline is much higher than those of γ-Al2O3 and γ-Al2O3 calcined at 900 ℃. Impregnation of θ-Al2O3 with ZnO can further enhance the hydrodesulfurization activity and selectivity of θ-Al2O3. The characterization results of pyridine adsorption Fourier transform infrared spectroscopy （FT-IR）, H2 temperature-programmed reduction （H2-TPR）, and X-ray diffraction indicate that there is only weak Lewis acidity on the surface of θ-Al2O3, and the FT-IR spectrum of pyridine adsorption on θ-Al2O3 is quite different from the other two aluminas. The loading of ZnO onto the surface of θ-Al2O3 results in the formation of Zn（A102）2 spinel structure and the shift of the high-temperature H2-TPR peak of the catalyst toward lower temperature.

关 键 词：全馏分催化裂化汽油 选择性加氢脱硫 氧化锌 氧化铝 路易斯酸 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]