High pressure N2/CH4 adsorption measurements in clinoptilolites

Autor:	K. Kesore, D. Bouloubasi, H.P. Grigoropoulou, N. Theophilou, S. Tzintzos, E. Kouvelos, Theodore Steriotis, N. Kanelopoulos
Rok vydání:	2007
Předmět:	education.field_of_study Clinoptilolite Sorbent Chemistry Diffusion Inorganic chemistry Population General Chemistry Condensed Matter Physics Methane Pressure swing adsorption chemistry.chemical_compound Adsorption Mechanics of Materials General Materials Science Zeolite education
Zdroj:	Microporous and Mesoporous Materials. 99:106-111
ISSN:	1387-1811
DOI:	10.1016/j.micromeso.2006.07.036
Popis:	The ability of clinoptilolite, a naturally occurring zeolite, to separate a nitrogen/methane gas mixture was studied experimentally. High-pressure nitrogen and methane adsorption isotherms at 273 and 298 K were measured for the raw material as well as for monovalent (Li+ and Na+) cation exchanged derivatives. The raw material showed promising results as a potential sorbent for kinetic pressure swing adsorption (PSA) processes. The type and population distribution of the charge-balancing cations affect significantly the adsorption and kinetic characteristic of the clinoptilolite samples. Both N2 and CH4 diffusion is activated, and thus sorption kinetics are a strong function of temperature. Based on our experimental data CH4 is more hindered and its mobility is significantly decreased at low temperatures. In this respect a kinetic PSA with fast cycles at low temperatures seems favourable.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1fe3b373002a01d6cf26f963011a3fd1 https://doi.org/10.1016/j.micromeso.2006.07.036 Zobrazit plný text záznamu Full Text from ScienceDirect