Conclusions
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1.
Through study of the alkylation of benzene by ethytene on a 0.67 CaNaY zeolite catalyst it has been shown that the increase in zeolite activity in carbonium type reactions under the action of CO2 is due to proton enrichment and an increase in the number of acid centers capable of participating in the catalytic process.
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2.
Dry CO2 adsorbs on the completely dehydrated CaNaY zeolite to form monodentate carbonate structures, without altering the system acidity. In the presence of water, formation of these carbonate structures is accompanied by an increase in the concentration and strength of the Brönsted acid centers.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2687–2693, December, 1978.
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Minachev, K.M., Isakov, Y.I. & Kalinin, V.P. The promoting effect of CO2 on zeolite catalysts. Russ Chem Bull 27, 2399–2404 (1978). https://doi.org/10.1007/BF00941084
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DOI: https://doi.org/10.1007/BF00941084