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7728633 
Journal Article 
Adsorption of volatile organic compounds in pure silica CHA, *BEA, MFI and STT-type zeolites 
Cosseron, AF; Daou, TJ; Tzanis, L; Nouali, H; Deroche, I; Coasne, B; Tchamber, V 
2013 
1 
Microporous and Mesoporous Materials
ISSN: 1387-1811 
ELSEVIER 
AMSTERDAM 
173 
147-154 
English 
WOS:000318210100020 
Four pure silica zeolites, chabazite (CHA-structure type) and SSZ-23 (STT-structure type) with cage-like structure and silicalite-1 (MFI-structure type) and beta (*BEA-structure type) with channel structure, were synthesized and fully characterized. Their sorption properties were examined using gravimetric method combined with Grand Canonical Monte Carlo simulations (GCMC). Of particular interest is the large difference in the adsorption rates of n-hexane, p-xylene and acetone observed for these zeosils at 25, 75 and 150 °C. As expected, in most cases, a decrease in the adsorption capacity is observed with increasing the molar volume of the used probe molecule and the temperature. An exception is observed for the pure silica CHA-type zeolite due to its small pore size which prevents molecules from entering its porosity. However, at higher temperature, the window size widens slightly and allows n-hexane and acetone, which have kinetic diameter close to the pore opening, to enter easily in chabazite. As a result, for this zeosil, an increase in the adsorption capacity compared to that obtained at 25 °C is observed. All these zeosils are promising for technological uses in car exhaust gas decontamination. © 2013 Elsevier Inc. All rights reserved. 
VOC adsorption; Zeolite; Hydrophobic zeolite; Cage-like structure; Channel structure