H. Koch, U. Böhmer, A. Klemt, W. Reschetilowski, M. Stöcker
{"title":"Influence of ion exchange and calcination on pore size and thermal stability of MCM-41 with different Si/Al ratios","authors":"H. Koch, U. Böhmer, A. Klemt, W. Reschetilowski, M. Stöcker","doi":"10.1039/A707287B","DOIUrl":null,"url":null,"abstract":"A decrease in pore size and increase in thermal stability of three different MCM-41 materials with Si/Al ratios of 18.6, 17.3 and 3.1, due to ammonia ion exchange and following calcination at 540°C, has been observed by N2 sorption measurements, differential thermal analysis (DTA) and X-ray diffraction (XRD). An explanation based on recrystallization at the pore mouth is proposed and the influence of the alumina content of the materials is discussed.","PeriodicalId":17286,"journal":{"name":"Journal of the Chemical Society, Faraday Transactions","volume":"7 1","pages":"817-820"},"PeriodicalIF":0.0000,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Chemical Society, Faraday Transactions","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1039/A707287B","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
A decrease in pore size and increase in thermal stability of three different MCM-41 materials with Si/Al ratios of 18.6, 17.3 and 3.1, due to ammonia ion exchange and following calcination at 540°C, has been observed by N2 sorption measurements, differential thermal analysis (DTA) and X-ray diffraction (XRD). An explanation based on recrystallization at the pore mouth is proposed and the influence of the alumina content of the materials is discussed.
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