W. Reschetilowski, U. Mroczek, K.-H. Steinberg, K.-P. Wendlandt
{"title":"铂分散对Pt/H-ZSM-5分子筛乙烷芳构化的影响","authors":"W. Reschetilowski, U. Mroczek, K.-H. Steinberg, K.-P. Wendlandt","doi":"10.1016/0166-9834(91)80110-I","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of the platinum dispersion and of the metal particle size distribution on the catalytic activity in the ethane aromatization over Pt/H-ZSM-5 zeolites was investigated at 823 K in a plug flow reactor. Comparatively high platinum dispersion and low average particle size caused by impregnation of the zeolite with ethanolic H<sub>2</sub>PtCl<sub>6</sub> solution lead to a close vicinity of metal and acid sites which is accompanied by an increased electrophilicity of the metal. Such a catalyst posesses a higher deactivation rate than those with more bulky platinum. The rapid deactivation is effected by a higher stability of the chemisorption complex metal-ethylene and by favouring of consecutive reactions of olefinic intermediates towards coke information.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 257-264"},"PeriodicalIF":0.0000,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80110-I","citationCount":"18","resultStr":"{\"title\":\"Influence of platinum dispersion on the ethane aromatization on Pt/H-ZSM-5 zeolites\",\"authors\":\"W. Reschetilowski, U. Mroczek, K.-H. Steinberg, K.-P. Wendlandt\",\"doi\":\"10.1016/0166-9834(91)80110-I\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The influence of the platinum dispersion and of the metal particle size distribution on the catalytic activity in the ethane aromatization over Pt/H-ZSM-5 zeolites was investigated at 823 K in a plug flow reactor. Comparatively high platinum dispersion and low average particle size caused by impregnation of the zeolite with ethanolic H<sub>2</sub>PtCl<sub>6</sub> solution lead to a close vicinity of metal and acid sites which is accompanied by an increased electrophilicity of the metal. Such a catalyst posesses a higher deactivation rate than those with more bulky platinum. The rapid deactivation is effected by a higher stability of the chemisorption complex metal-ethylene and by favouring of consecutive reactions of olefinic intermediates towards coke information.</p></div>\",\"PeriodicalId\":8091,\"journal\":{\"name\":\"Applied Catalysis\",\"volume\":\"78 2\",\"pages\":\"Pages 257-264\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1991-11-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0166-9834(91)80110-I\",\"citationCount\":\"18\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Catalysis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/016698349180110I\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/016698349180110I","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Influence of platinum dispersion on the ethane aromatization on Pt/H-ZSM-5 zeolites
The influence of the platinum dispersion and of the metal particle size distribution on the catalytic activity in the ethane aromatization over Pt/H-ZSM-5 zeolites was investigated at 823 K in a plug flow reactor. Comparatively high platinum dispersion and low average particle size caused by impregnation of the zeolite with ethanolic H2PtCl6 solution lead to a close vicinity of metal and acid sites which is accompanied by an increased electrophilicity of the metal. Such a catalyst posesses a higher deactivation rate than those with more bulky platinum. The rapid deactivation is effected by a higher stability of the chemisorption complex metal-ethylene and by favouring of consecutive reactions of olefinic intermediates towards coke information.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
