Formation of coke and minor products in 2-methylpentane cracking over USHY
The formation of coke and minor products in 2-methylpentane cracking on USHY has been examined at 673, 723, and 773 K. The results show that the coke precursors are various dehydrogenated carbocations on catalyst surface. Despite the increase of coke yield with reaction time, the selectivity and H/C...
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| Veröffentlicht in: | AIChE journal 2008-03, Vol.54 (3), p.750-755 |
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| creator | Zhao, Yingxian Wei, Feng Yu, Ying |
| description | The formation of coke and minor products in 2-methylpentane cracking on USHY has been examined at 673, 723, and 773 K. The results show that the coke precursors are various dehydrogenated carbocations on catalyst surface. Despite the increase of coke yield with reaction time, the selectivity and H/C atomic ratio of coke decrease with rising temperature. Echoing to the formation of coke, minor products including acyclic paraffins, acyclic olefins, methylcyclopentane, diolefins, cyclic olefins, and aromatics are formed by various side-reactions of carbenium ions, such as dehydrogenation, elimination, disproportionation, cyclization, and aromatization. Undergoing of such pathological reaction processes gradually lead to catalyst deactivation. © 2008 American Institute of Chemical Engineers AIChE J, 2008. |
| doi_str_mv | 10.1002/aic.11412 |
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The results show that the coke precursors are various dehydrogenated carbocations on catalyst surface. Despite the increase of coke yield with reaction time, the selectivity and H/C atomic ratio of coke decrease with rising temperature. Echoing to the formation of coke, minor products including acyclic paraffins, acyclic olefins, methylcyclopentane, diolefins, cyclic olefins, and aromatics are formed by various side-reactions of carbenium ions, such as dehydrogenation, elimination, disproportionation, cyclization, and aromatization. Undergoing of such pathological reaction processes gradually lead to catalyst deactivation. © 2008 American Institute of Chemical Engineers AIChE J, 2008.</description><subject>2-methylpentane</subject><subject>Applied sciences</subject><subject>Catalysis</subject><subject>catalyst deactivation</subject><subject>Catalytic cracking</subject><subject>Catalytic reactions</subject><subject>Chemical engineering</subject><subject>Chemical reactions</subject><subject>Chemistry</subject><subject>Coke</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>minor products</subject><subject>Reactors</subject><subject>Theory of reactions, general kinetics. Catalysis. 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Nomenclature, chemical documentation, computer chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhao, Yingxian</creatorcontrib><creatorcontrib>Wei, Feng</creatorcontrib><creatorcontrib>Yu, Ying</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>AIChE journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhao, Yingxian</au><au>Wei, Feng</au><au>Yu, Ying</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Formation of coke and minor products in 2-methylpentane cracking over USHY</atitle><jtitle>AIChE journal</jtitle><addtitle>AIChE J</addtitle><date>2008-03</date><risdate>2008</risdate><volume>54</volume><issue>3</issue><spage>750</spage><epage>755</epage><pages>750-755</pages><issn>0001-1541</issn><eissn>1547-5905</eissn><coden>AICEAC</coden><abstract>The formation of coke and minor products in 2-methylpentane cracking on USHY has been examined at 673, 723, and 773 K. The results show that the coke precursors are various dehydrogenated carbocations on catalyst surface. Despite the increase of coke yield with reaction time, the selectivity and H/C atomic ratio of coke decrease with rising temperature. Echoing to the formation of coke, minor products including acyclic paraffins, acyclic olefins, methylcyclopentane, diolefins, cyclic olefins, and aromatics are formed by various side-reactions of carbenium ions, such as dehydrogenation, elimination, disproportionation, cyclization, and aromatization. Undergoing of such pathological reaction processes gradually lead to catalyst deactivation. © 2008 American Institute of Chemical Engineers AIChE J, 2008.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><doi>10.1002/aic.11412</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | 2-methylpentane Applied sciences Catalysis catalyst deactivation Catalytic cracking Catalytic reactions Chemical engineering Chemical reactions Chemistry Coke Exact sciences and technology General and physical chemistry minor products Reactors Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Formation of coke and minor products in 2-methylpentane cracking over USHY |
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