NiO或NiSO_4改性的纳米HZSM-5催化剂的加氢脱硫活性  

Hydrodesulfurization Activity of Nano-sized HZSM-5 Catalyst Modified by NiO or NiSO_4

作　　者：王文寿[1] 郭洪臣[1] 刘海鸥[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》2008年第8期705-709,共5页

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SO42-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.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 SO4^2- 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.

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 

分 类 号：TE621[石油与天然气工程—油气加工工程]