Hydrodenitrogenation of pyridine over activated carbon-supported sulfided Mo and NiMo catalysts. Effects of hydrogen sulfide and oxidation of the support

被引：6

作者：

Calafat, A ^{[1
]}

Laine, J ^{[1
]}

LopezAgudo, A ^{[1
]}

机构：

[1] CSIC,INST CATALISIS & PETR QUIM,MADRID 28049,SPAIN

来源：

CATALYSIS LETTERS | 1996年 / 40卷 / 3-4期

关键词：

HDN; carbon-supported catalysts; NiMo catalysts; sulfided catalysts;

D O I：

10.1007/BF00815287

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The hydrodenitrogenation (HDN) of pyridine over activated carbon-supported Mo and NiMo sulfided catalysts was studied. Without H2S in the feed the catalysts showed a high conversion of pyridine and of piperidine to C-5 hydrocarbons at the beginning of reaction, followed by a strong deactivation. A large increase in the conversion of pyridine was observed when H2S was added to the feed at H2S/H-2 greater than or equal to 0.006. The conversion of piperidine to C-5 hydrocarbons was enhanced by H2S and it increased as the H2S pressure increases up to H2S/H-2 greater than or equal to 0.006. The promotion effect of Ni was operative only when H2S was present and it increased with the H2S/H-2 ratio. Without H2S, the degree of surface oxidation of the support affected the deactivation of the catalysts. When H2S was added to the feed, the conversion of pyridine was stable and independent of the acid treatment of the support. A more oxidized support enhanced the C-N bond breaking reaction.

引用

页码：229 / 234

页数：6

共 22 条

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[2]

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[3]

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