Issue 0, 1975

Zeolites X, Y and A enriched with trivalent cations: sorption of carbon dioxide and ammonia. Part 1.—Isotherms and affinities

Abstract

The preparation of zeolites X, Y and A enriched with Fe3+, Y3+, Cr3+, Co3+ and Tl+ and their sorptive properties towards carbon dioxide and ammonia are discussed. Adsorption is reversible and reproducible for all the systems and in zeolites X and Y the uptake of CO2 decreases with the degree of exchange; this is attributed to depopulation of supercage cation sites during the exchange process. Agreement between the experimental sorption data and theoretical isotherms is excellent for CO2 in zeolites X and Y; agreement is less favourable for zeolite A. From an analysis of the isosteric heats and sorption affinities it is concluded that the electrostatic fields generated by the M3+ cations were shielded from interaction with CO2 but there was evidence that the trivalent cations had limited interaction with the NH3 molecules.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 1, 1975,71, 1809-1817

Zeolites X, Y and A enriched with trivalent cations: sorption of carbon dioxide and ammonia. Part 1.—Isotherms and affinities

B. Coughlan and S. Kilmartin, J. Chem. Soc., Faraday Trans. 1, 1975, 71, 1809 DOI: 10.1039/F19757101809

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