Diffusion of n-alkanes in zeolites: the benefit of observation over different length scales

摘要：

First results of an international research collaboration to study zeolitic diffusion are presented. By using a variety of experimental techniques, molecular diffusion paths are probed over different time and length scales. As host-guest systems the homologous series of n-alkanes in zeolites NaCaA and silicalite-1 have been selected. Since the diffusivities are found to be the smaller the longer are the diffusion paths covered during the experiments, the observed differences may be explained by the existence of transport resistances acting in addition to the intracrystalline zeolite bulk phase. In selective experiments, indications of such resistances are traced from the range of some 100 nm up to crystal dimensions.

作者: S. Brandani J. Caro H. Jobicc J. Karger C. Krause R. Staudt

作者单位: Centre for CO2 Technology, Department of Chemical Engineering, University College London, Torrington Inst. f. Physikalische Chemie u. Elektrochemie, Universitat Hannover, Callinstr. 3-3A, D-30167 Hanno Institut de Recherches sur la Catalyse - CNRS 2, Avenue Albert-Einstein, F-69626 Villeurbanne Cedex, Universitat Leipzig, Fakultat fur Physik und Geowissenschaften, Linnestr. 5, D-04103 Leipzig, German Inst. f. Nichtklassische Chemie e.V., Permoserstr. 15, D-04318 Leipzig, Germany

会议类型: 国际会议

会议名称: 第15届国际分子筛大会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-12（万方平台首次上网日期，不代表论文的发表时间）