Inhibition of the Hydrogenation and Hydrodesulfurization Reactions by Nitrogen Compounds over NiMo/Al₂O₃

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• 作者：A. R. Beltramone ; S. Crossley ; D. E. Resasco ; W. E. Alvarez and T. V. Choudhary
• 关键词：Inhibition ; Aromatic hydrogenation ; Nitrogen ; Hydrodesulfurization
• 刊名：Catalysis Letters
• 出版年：2008
• 出版时间：July, 2008
• 年：2008
• 卷：123
• 期：3-4
• 页码：181-185
• 全文大小：310.0 KB

文摘

The inhibiting effect of nitrogen compounds on the hydrogenation of aromatic compounds and on the hydrodesulphurization (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6 DMDBT), has been systematically investigated over a commercial NiMo hydrotreating catalyst. Amongst the different nitrogen compounds considered, interestingly ammonia was found to have the strongest inhibition effect on hydrogenation as well as on hydrodesulfurization reactions. The inhibiting effects were found to increase in the order quinoline < tetrahydroquinoline < indole < indoline < ammonia for phenanthrene/tetralin hydrogenation and HDS reactions. The molecules with nitrogen atoms having higher negative Mulliken charges showed higher adsorption constants.