Subject Area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
Conference NameThe 232nd ACS National Meeting
Conference Date2006-9-10
Conference Place美国
Funding Organization美国化学会
AbstractThe 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.
Document Type会议论文
Corresponding AuthorShu YY(舒玉瑛)
Recommended Citation
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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