Catalytic Hydrodenitrogenation of Asphaltene Model Compounds

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• 作者：Judah M. J.-B. Mierau ; Nancy Zhang ; Xiaoli Tan ; Alexander Scherer ; Jeffrey M. Stryker ; Rik R. Tykwinski ; Murray R. Gray
• 刊名：Energy & Fuels
• 出版年：2015
• 出版时间：October 15, 2015
• 年：2015
• 卷：29
• 期：10
• 页码：6724-6733
• 全文大小：466K
• ISSN：1520-5029

文摘

The catalytic hydrodenitrogenation of heavy petroleum fractions is important for the production of high-quality fuels, because the nitrogen-bearing compounds poison acidic catalysts and inhibit sulfur removal. Two families of synthetic nitrogen-containing model compounds representative of asphaltene molecular structures were catalytically hydrogenated over a commercial NiMo/纬Al₂O₃ catalyst under industrial hydrotreating conditions, i.e., 370 掳C and 18 MPa of hydrogen for 1 h, in a stainless steel batch reactor. The bridged compounds with pyridine as a center ring gave cracking, hydrogenation, and hydrodenitrogenation products with selectivities that depended on the position of substituents on the central pyridine ring. In contrast, a series of fused cholestane-benzoquinoline compounds gave only hydrogenation of all-carbon aromatic rings.