Vapor phase methylation of pyridine with CO-H2 over metal catalysts

被引：5

作者：

Fujita, S ^{[1
]}

Hiyoshi, N ^{[1
]}

Takezawa, N ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Engn, Div Engn & Mat Sci, Sapporo, Hokkaido 0608628, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 1999年 / 185卷 / 02期

关键词：

methylation of pyridine; formation of methylpyridine; formation of dimethylpyridine; CO methanation; metal catalysts;

D O I：

10.1016/S0926-860X(99)00189-1

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 title reaction was carried out over Ni, Ni/SiO2, Ni/Al2O3, Ni/ZrO2, Ni/MgO, Co/SiO2, Ru/SiO2, Rh/SiO2, Pt/SiO2 and Pd/SiO2 catalysts. Over Ni, Ni/SiO2, Ni/Al2O3, Ni/ZrO2 and Ni/MgO, 2-methylpyridine is produced with high selectivity along with small amounts of 2,6-dimethylpyridine and methane. Methylation occurs selectively at carbon atoms adjacent to a nitrogen atom. The order of the catalytic activity is Ni/Al2O3 > Ni/ZrO2 > Ni > Ni/SiO2 > Ni/MgO. It was found that 2,6-dimethylpyridine is produced via methylation of 2-methylpyridine, and that methylation of pyridine with CO-H-2 and CO methanation are parallel reactions. CHx species produced from CO-H-2 are consumed effectively for methylation of pyridine. Over Co/SiO2 and Ru/SiO2, although methylation occurs, the yield is very low. Over Rh/SiO2, Pt/SiO2 and Pd/SiO2, methylation is not observed. Differences in the yields of the catalysts are discussed. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：323 / 327

页数：5

共 31 条

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