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学科主题物理化学
Structure-sensitivity of hydrodesulfurization of 4,6-dimethyldibenzothiophene over silica-supported nickel catalysts
Shu YY(舒玉瑛); Yong-KulLee; S.T.Oyama
会议名称The 232nd ACS National Meeting
会议日期2006-9-10
2006-09-10
会议地点美国
页码1/2
部门归属十五室
主办者美国化学会
英文摘要The effect of surface area on the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DMDBT) was studied on a series of supported nickel phosphide catalysts of low (Ni2P/SiO2-L, 96 m2 g-1), medium (Ni2P/SiO2-M, 133 m2 g-1) and high (Ni2P/SiO2-H, 208 m2 g-1) specific surface areas. The best catalyst, Ni2P/SiO2-H, gave a steady-state conversion of 99+% at 613 K, which was higher than that of the Ni2P/SiO2-M (94%) or the Ni2P/SiO2-L (76%). The order (H > M > L) correlated with the dispersion of the catalysts as measured from CO uptakes (125 vs. 99 vs. 59 µmol g-1), and the Ni2P crystallite size as determined from X-ray diffraction (6.5 vs. 7.8 vs. 10.1 nm). Extended X-ray absorption fine structure (EXAFS) and elemental analysis measurements showed that the nickel phosphide was partially sulfided and formed a surface phosphosulfide phase in the HDS reaction. The HDS reaction for this molecule is structure-sensitive.
语种中文
文献类型会议论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/112100
专题中国科学院大连化学物理研究所
通讯作者Shu YY(舒玉瑛)
推荐引用方式
GB/T 7714
Shu YY,Yong-KulLee,S.T.Oyama. Structure-sensitivity of hydrodesulfurization of 4,6-dimethyldibenzothiophene over silica-supported nickel catalysts[C],2006:1/2.
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