About: Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry

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About: Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry Goto Sponge NotDistinct Permalink

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Description	Adsorption of CO2 as probe molecule on alkali-metal zeolites of MFI structure was investigated by joint volumetry-calorimetry. Consideration was given to the interpretation of the heat evolved when a probe molecule is adsorbed on the surface. In particular, the number and the strength of adsorption sites are discussed as functions of zeolite structure, concentration, and nature of extra-framework cation. The adsorption heats (qiso) of CO2 interaction with alkali-metal cations decrease for MFI zeolite with high Si/Al in the sequence Li+ } Na+ } K+ from 54 kJ/mol to 49 and 43 kJ/mol, respectively. In addition, the adsorption heats are influenced by concentration of Al in the framework. This phenomenon is attributed to formation of bridged CO2 adsorption complexes formed between two cations. On the base of quantitative analysis of adsorption processes, presence of geminal adsorption complexes was suggested for adsorption at higher equilibrium pressures. Adsorption of CO2 as probe molecule on alkali-metal zeolites of MFI structure was investigated by joint volumetry-calorimetry. Consideration was given to the interpretation of the heat evolved when a probe molecule is adsorbed on the surface. In particular, the number and the strength of adsorption sites are discussed as functions of zeolite structure, concentration, and nature of extra-framework cation. The adsorption heats (qiso) of CO2 interaction with alkali-metal cations decrease for MFI zeolite with high Si/Al in the sequence Li+ } Na+ } K+ from 54 kJ/mol to 49 and 43 kJ/mol, respectively. In addition, the adsorption heats are influenced by concentration of Al in the framework. This phenomenon is attributed to formation of bridged CO2 adsorption complexes formed between two cations. On the base of quantitative analysis of adsorption processes, presence of geminal adsorption complexes was suggested for adsorption at higher equilibrium pressures. (en)
Title	Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry (en)
skos:prefLabel	Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry (en)
skos:notation	RIV/00216275:25310/11:39892369!RIV12-GA0-25310___
http://linked.open...avai/predkladatel	Fakulta chemicko-technologická
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA203/09/0143), P(LC512)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Frýdová, Eva Bulánek, Roman Čičmanec, Pavel Frolich, Karel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Pardubice / Fakulta chemicko-technologická
http://linked.open...dnocenehoVysledku	233024
http://linked.open...ai/riv/idVysledku	RIV/00216275:25310/11:39892369
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Calorimetry; MFI; Zeolite; CCS; Carbon dioxide; Heat; Adsorption (en)
http://linked.open.../riv/klicoveSlovo	MFI Zeolite Adsorption CCS Carbon dioxide Calorimetry Heat
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[2CCD85CEB829]
http://linked.open...i/riv/nazevZdroje	Journal of Thermal Analysis and Calorimetry (Paper)
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Combined theoretical and experimental investigation of gas-zeolite interaction: adsorption, separation, gas storage Center for biomolecules and complex molecular systems
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	105
http://linked.open...iv/tvurceVysledku	Bulánek, Roman Frýdová, Eva Čičmanec, Pavel Frolich, Karel
http://linked.open...ain/vavai/riv/wos	000293213000009
issn	1388-6150
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10973-010-1108-y
http://localhost/t...ganizacniJednotka	25310
is http://linked.open...avai/riv/vysledek of	Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry

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