The adsorption of C 2 H 4 , C 2 H 6 and CO has been studied on Zn 2+ ‐exchanged A‐zeolites. Partial exchange with Zn 2+ or Cd 2+ increases the adsorption capacity for C 2 H 4 and CO. Complete Zn 2+ exchange leads to a decrease, indicating a complicated variation of cation positions with exchange level. N.m.r. measurements are consistent with adsorption of C 2 H 4 as weak π‐complexes on the divalent cations. Weak specific adsorption complexes are also demonstrated for CO.
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Emesh et al. (1985) studied this question.
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