催化学报 ›› 2008, Vol. 29 ›› Issue (8): 705-709.

• 研究论文 • 上一篇    下一篇

NiO或NiSO4改性的纳米HZSM-5催化剂的加氢脱硫活性

王文寿,郭洪臣,刘海鸥,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:2008-08-25 出版日期:2008-08-25 发布日期:2012-06-20

Hydrodesulfurization Activity of Nano-sized HZSM-5 Catalyst Modified by NiO or NiSO4

WANG Wenshou, GUO Hongchen, LIU Hai'ou, WANG Xiangsheng*   

  1. State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering, Dalian University of Technology, Dalian 116012, Liaoning, China
  • Received:2008-08-25 Online:2008-08-25 Published:2012-06-20

摘要: 研究了纳米HZSM-5及其用不同镍化合物改性的催化剂的脱硫活性. 结果表明,对全馏分催化裂化汽油脱硫, NiSO4改性比NiO改性的催化剂有更好的脱硫活性稳定性. 通过催化剂吸附吡啶前后的傅里叶变换红外光谱、氨程序升温脱附和微分热重分析等表征结果发现, NiSO4中的SO2-4与催化剂中的Al2O3之间存在着较强的相互作用; 这种相互作用可以产生类似于超强酸的酸性质,大大提高了催化剂路易斯酸中心的数量和强度,从而提高了催化剂催化脱硫活性的稳定性.

关键词: 全馏分催化裂化汽油, 加氢脱硫, HZSM-5分子筛, 硫酸镍, 乙酸镍, 硝酸镍

Abstract: The hydrodesulfurization (HDS) activity of nano-sized HZSM-5 catalyst modified by different nickel species was measured with full-range FCC gasoline as feedstock. The results indicated that the nano-sized HZSM-5 catalyst modified by NiSO4 showed more stable HDS activity than the nano-sized HZSM-5 catalyst modified by NiO. The characterization of FT-IR spectra before and after pyridine adsorption, ammonium temperature-programmed desorption, and differential thermogravimetry showed that there was a strong interaction between SO2-4 and Al2O3 in the catalyst modified by NiSO4. The interaction increased both the amount and the strength of acid sites by creating a kind of acidity, being like super acid.

Key words: full-range fluid catalytic cracking gasoline, hydrodesulfurization, HZSM-5 zeolite, nickel sulfate, nickel acetate, nickel nitrate