Catalytic Cracking of Cycloparaffins Admixed with Olefins:2. Single-Event Microkinetic(SEMK) Assessment 被引量：1

Catalytic Cracking of Cycloparaffins Admixed with Olefins:2. Single-Event Microkinetic(SEMK) Assessment

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摘要 The developed SEMK model is used to provide an insight into the contribution of individual reactions in the cracking of methylcyclohexane as well as the site coverage by various carbenium ions. The preferred reaction pathways for the conversion of methylcyclohexane are hydride transfer reactions followed by PCP-isomerizations, deprotonation and endocyclic β-scission, accounting for 61%, 22% and 12% of its disappearance, respectively, at 693 K and 30% conversion of methylcyclohexane. Protolysis plays a minor role in the cracking of methylcyclohexane. Once cyclic diolefins are formed, all of them can be instantaneously transformed to aromatics, which are easily interconverted via disproportionation. Judging from the carbenium ion concentrations it is evident that, at the investigated operating conditions, less than 5% of the acid sites are covered by carbenium ions, less than 2% of which corresponds to cyclic type species including allylic ones. The developed SEMK model is used to provide an insight into the contribution of individual reactions in the cracking of methylcyclohexane as well as the site coverage by various carbenium ions. The preferred reaction pathways for the conversion of methylcyclohexane are hydride transfer reactions followed by PCP-isomerizations, deprotonation and endocyclic β-scission, accounting for 61%, 22% and 12% of its disappearance, respectively, at 693 K and 30% conversion of methylcyclohexane. Protolysis plays a minor role in the cracking of methylcyclohexane. Once cyclic diolefins are formed, all of them can be instantaneously transformed to aromatics, which are easily interconverted via disproportionation. Judging from the carbenium ion concentrations it is evident that, at the investigated operating conditions, less than 5% of the acid sites are covered by carbenium ions, less than 2% of which corresponds to cyclic type species including allylic ones.

作者 Xue Gaoping Weng Huixin Joris W.Thybaut Guy B.Marin

机构地区 Research Institute of Petroleum Processing Laboratory for Chemical Technology

出处《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2014年第2期84-90,共7页 中国炼油与石油化工（英文版）

基金 the financial support from the China Scholarship Council the Long Term Structural Methusalem Funding by the Flemish Government

关键词 catalytic cracking single-event microkinetic model cycloparaffin OLEFIN site coverage by carbenium ions 二烯烃裂解环烷烃单事件氢转移反应催化评估碳正离子

分类号 TE624.41 [石油与天然气工程—油气加工工程]

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1Xue Gaoping,Weng Huixin,Thybaut Joris W.,Marin Guy B..Catalytic Cracking of Cycloparaffins Admixed with Olefins:1. Single-Event Microkinetic(SEMK) Modeling[J].China Petroleum Processing & Petrochemical Technology,2014,16(1):71-80. 被引量：3

二级参考文献33

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