Promotion effect of 2-methylpiperidine on the direct desulfurization of dibenzothiophene over NiMo/γ-Al2O3

被引：11

作者：

Egorova, M ^{[1
]}

Prins, R ^{[1
]}

机构：

[1] ETH, Inst Chem & Bioengn, CH-8093 Zurich, Switzerland

来源：

CATALYSIS LETTERS | 2004年 / 92卷 / 3-4期

关键词：

hydrotreating; hydrodesulfurization; HDS; dibenzothiophene; DBT; hydrodenitrogenation; HDN; 2-methylpyridine; 2-methylpiperidine; promoting effect of N-compound;

D O I：

10.1023/B:CATL.0000014344.37981.9c

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 hydrodesulfurization (HDS) of dibenzothiophene (DBT) was studied at 300 degreesC, 4.8 MPa H-2 and 35 kPa H2S in the presence of 0 to 6 kPa 2-methylpyridine and 2-methylpiperidine. 2-Methylpyridine suppressed the hydrogenation pathway by a factor of 6 to 30, depending on its partial pressure, and moderately inhibited the direct desulfurization pathway of the HDS of DBT ( by a factor of 2 or less). 2-Methylpiperidine suppressed the hydrogenation by a factor of 10 to 50 but promoted the direct desulfurization of DBT at low partial pressures of 2-methylpiperidine. Both pathways were inhibited at high concentrations of 2-methylpiperidine. Structural and electronic factors may account for the promoting effect of 2-methylpiperidine.

引用

页码：87 / 91

页数：5

共 26 条

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