Adsorption of ethane and ethylene on X-zeolites containing Li+, Na+, K+, Rb+and Cs+cations

Bezus, A. G.; Киселев, А. В.; Sedláček, Z.

doi:10.1039/tf9716700468

Cited by 73 publications

(25 citation statements)

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“…The Na + and Li + ions located in SII sites are represented in green and light blue respectively. The Li + −O(CO 2 ) and Na + −O(CO 2 ) distances are reported in Å mental and theoretical results for the adsorption of CO 2 in faujasite X (Barrer and Gibbons 1965) or other gases in various zeolite systems (Bezus et al 1971;Dzhigit et al 1971) which has been usually attributed to the strongest polarizing power of Li + . These simulated enthalpies at the initial stage of adsorption estimated to be −38.4 kJ·mol −1 and −31.3 kJ·mol −1 at 323 K for LiY and NaY, respectively, are also in good agreement with those previously calculated using a combination of both DFT calculations and microcalorimetry measurements (Plant et al 2006).…”

Section: Resultsmentioning

confidence: 99%

“…In the past few years, several experimental studies (Bezus et al 1971;Dzhigit et al 1971;Macedonia et al 2000) have dealt with the influence of either the nature or density of these extra-framework cations on the adsorption properties of various zeolite systems. It was clearly established that these cations play a key role in the adsorption phenomena in such materials.…”

Section: Introductionmentioning

confidence: 99%

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CO2 adsorption in LiY and NaY at high temperature: molecular simulations compared to experiments

et al. 2007

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Grand Canonical Monte Carlo simulations combined with adsorption measurements have been carried out to gain further insight into the CO 2 adsorption process at the microscopic scale in both LiY and NaY faujasites at various temperatures. A new Li + −CO 2 force field derived by ab initio calculations was validated by a reasonable agreement between the simulated isotherms and those obtained by experiments in a wide range of temperature (from 323 K to 473 K). In addition, the microscopic mechanisms of CO 2 adsorption in both systems, consistent with the trends observed for the simulated differential enthalpies of adsorption as a function of the loading, were proposed. It was observed that two different types of adsorption behaviour exist for NaY and LiY at 323 K and 373 K, mainly caused by the significant more exposed position of the SII Na + from the six-ring plane of the supercage compared to those occupied by the SII Li + , whereas at higher temperature, both faujasites exhibit the same flat profile for the differential enthalpy of adsorption as a function of loading.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CO2 adsorption in LiY and NaY at high temperature: molecular simulations compared to experiments

et al. 2007

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“…Firstly, water molecules interact with Lewis acids and transform them into Bronsted acids whose acidity is associated with labile protons. Secondly, it is known from the analysis of ethane and ethylene adsorption on zeolites (Bezus et al, 1971) that the energy of specific interaction increases with decreasing radius of the exchange cation. This suggests that we should expect higher e~ values for Bronsted acid sites because they are related to the presence of H + cations whereas Lewis sites are related to metal cations.…”

Section: Resultsmentioning

confidence: 99%

Chemical and structural properties of clay minerals modified by inorganic and organic material

et al. 1992

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A B S T R A C T:Modification of clay minerals by exchange, intercalation, calcination and imbibition of organics followed by their polymerization and carbonization was studied. The surface properties of the clays were investigated by inverse gas chromatography at infinite dilution employing alkanes and alkenes as probes; the structural properties were measured directly by X-ray diffraction and inferred from the results of high pressure hydrogen adsorption. Calcination of pillared smectites prior to polymerization and carbonization of organic material in the interlayer space leads to a microporous "activated carbon" that demonstrates unique properties as an adsorbent for hydrogen, significantly different from clays that have not been calcined.

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“…[63] A study by Bezus and co-workers [64] described differential interactions of ethane and ethylene adsorbed in X-zeolites. The measurement of adsorption isotherms revealed not only the binding energies for the putative cationϪπ interaction but suggested a charge density correlation for the interactions.…”

Section: Zeolitesmentioning

confidence: 99%

Experimental Evidence for Alkali Metal Cation−π Interactions

2000

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Adsorption of ethane and ethylene on X-zeolites containing Li⁺, Na⁺, K⁺, Rb⁺and Cs⁺cations

Cited by 73 publications

References 0 publications

CO2 adsorption in LiY and NaY at high temperature: molecular simulations compared to experiments

CO2 adsorption in LiY and NaY at high temperature: molecular simulations compared to experiments

Chemical and structural properties of clay minerals modified by inorganic and organic material

Experimental Evidence for Alkali Metal Cation−π Interactions

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