催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (9): 823-828.

• 研究论文 • 上一篇    下一篇

ZnO/θ-Al2O3催化剂上全馏分FCC汽油的选择性加氢脱硫

温广明,王文寿,陈黎行,郭洪臣,王祥生   

  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
  • 收稿日期:2007-09-25 出版日期:2007-09-25 发布日期:2011-09-28

Selective Hydrodesulfurization of Full-Range FCC Gasoline over ZnO/θ-Al2O3 Catalyst

WEN Guangming, WANG Wenshou, CHEN Lixing, GUO Hongchen*, WANG Xiangsheng   

  1. State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2007-09-25 Online:2007-09-25 Published:2011-09-28

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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.

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

Abstract: 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), andX-raydiffraction 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(AlO2)2 spinel structure and the shift of the high-temperature H2-TPR peak of the catalyst toward lower temperature.

Key words: full-range FCC gasoline, selective hydrodesulfurization, zinc oxide, alumina, Lewis acid