Adsorption and diffusion of alkanes and their mixtures in silicalite studied with positron emission profiling technique

A.O. Koriabkina, D. Schuring, J. Grondelle, van, A.M. Jong, de, R.A. Santen, van

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The Tracer-Exchange Positron Emission Profiling (TEX-PEP) technique has been applied for in-situ measurement of the adsorption and diffusion of hexane and 2-methylpentane mixts. in large crystallite (150mm) of silicalite-1 at 160°C under steady-state conditions. N-hexane adsorption is slightly preferred. Mobility of n-hexane strongly decreases with increasing fraction of 2-methylpentane, and it suddenly drops when the pore occupation with 2-methylpentane is much bigger then with n-hexane. A small decrease in the diffusivity of 2-methylpentane is also obsd. Pulse expts. were performed to measure isotherms of adsorption of 3-methylpentane on silicalite-1 at temps. 130-210°C. Obtained values of enthalpy and entropy of adsorption are in a good agreement with theor. calcns.
Original languageEnglish
Title of host publicationZeolites and Mesoporous Materials at the Dawn of the 21st Century
EditorsA. Galarneau
Place of PublicationAmsterdam
PublisherElsevier
Pages3129-3136
ISBN (Print)0-444-50238-6
DOIs
Publication statusPublished - 2001
Eventconference; 13th International Zeolite Conference, Montpellier, France, 8 - 13 July 2001; 2001-07-08; 2001-07-13 -
Duration: 8 Jul 200113 Jul 2001

Publication series

NameStudies in Surface Science and Catalysis
Volume135
ISSN (Print)0167-2991

Conference

Conferenceconference; 13th International Zeolite Conference, Montpellier, France, 8 - 13 July 2001; 2001-07-08; 2001-07-13
Period8/07/0113/07/01
Other13th International Zeolite Conference, Montpellier, France, 8 - 13 July 2001

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