Hydrogenation Conversion of Phenanthrene over Dispersed Mo-based Catalysts  

作　　者：Hu Yiwen Da Zhijian Wang Zijun 

机构地区：[1]SINOPEC Research Institute of Petroleum Processing

出　　处：《China Petroleum Processing & Petrochemical Technology》2015年第3期7-14,共8页中国炼油与石油化工（英文版）

基　　金：the financial support from the National Basic Research Program of China (Grant 2012CB224801)

摘　　要：With oil-soluble molybdenum compound and sublimed sulfur serving as raw materials, two dispersed Mo-based catalysts were prepared, characterized and then applied to the hydrogenation conversion of phenanthrene. The test results showed that under the conditions specified by this study, the catalyst prepared in a higher sulfiding atmosphere was more catalytically active due to its higher content of MoS2 and stronger intrinsic catalytic activity of MoS2 unit, which demonstrated that the sulfiding atmosphere for the preparation of catalysts not only could influence the yield of MoS2 but also the structure of MoS2.The analysis on the selectivity of octahydrophenanthrene isomers revealed that the catalyst prepared in a lower sulfiding atmosphere had a relatively higher catalytic selectivity to the hydrogenation of outer aromatic ring and the structure of catalysts could be modified under the specific reaction conditions. Moreover, the selectivity between the isomers of as-octahydrophenanthrene at different reaction time and temperature was analyzed and, based on the results, a hydrogenation mechanism over dispersed Mo-based catalysts was suggested, with monatomic hydrogen transfer and catalytic surface desorption of the half-addition intermediates functioning as the key points. In addition, it is concluded that the catalyst prepared in a lower sulfiding atmosphere was more capable of adsorption than the other one.With oil-soluble molybdenum compound and sublimed sulfur serving as raw materials, two dispersed Mo-basedcatalysts were prepared, characterized and then applied to the hydrogenation conversion of phenanthrene. The test resultsshowed that under the conditions specified by this study, the catalyst prepared in a higher sulfiding atmosphere was morecatalytically active due to its higher content of MoS2 and stronger intrinsic catalytic activity of MoS2 unit, which demonstratedthat the sulfiding atmosphere for the preparation of catalysts not only could influence the yield of MoS2 but also thestructure of MoS2. The analysis on the selectivity of octahydrophenanthrene isomers revealed that the catalyst prepared in alower sulfiding atmosphere had a relatively higher catalytic selectivity to the hydrogenation of outer aromatic ring and thestructure of catalysts could be modified under the specific reaction conditions. Moreover, the selectivity between the isomersof as-octahydrophenanthrene at different reaction time and temperature was analyzed and, based on the results, a hydrogenationmechanism over dispersed Mo-based catalysts was suggested, with monatomic hydrogen transfer and catalytic surfacedesorption of the half-addition intermediates functioning as the key points. In addition, it is concluded that the catalystprepared in a lower sulfiding atmosphere was more capable of adsorption than the other one.

关 键 词：dispersed Mo-based catalysts phenanthrene conversion MoS2 structure product selectivity hydrogenationmechanism 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]