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Influence of cerium and lanthanum cations on the thermal stability of HY zeolite. Characterization of the zeolitic structure by nitrogen adsorption

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Abstract

Capacities for nitrogen adsorption of HY, CeHY and LaHY zeolites have been measured after calcination at several temperatures. CeHY and LaHY zeolites were prepared by ion exchange of HY, both presenting the same rare earth exchange ratio of 41%. Rare earth HY zeolites calcined at 1073 K present higher adsorption capacity than HY, which allows to conclude that cerium and mainly lanthanum increase the thermal stability of HY zeolite.

Abstract

Емкость адсорбции азота на цеолитах HY, CeHY и LaHY измеряли после обжига при различных температурах. Цеолиты CeHY и LaHY приготовляли ионным обменом HY, причем для обонх была достигнута одинаковая доля обмена редкоземельного металла, равная 41%. Цеолиты с редкоземельными металлами после их обжига при 1073 K обладают повышенной емкостью адсорбции по сравнению с цеолитами HY. Отсюда можно заключить, что церий и, в особенности, лантан повышают термическую стабильность цеолитов HY.

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Authors and Affiliations

  1. Centro de Química Física e Radioquímica, Faculdade de Ciências da Universidade de Lisboa, R. Escola Politécnica, 1200, Lisboa, Portugal

    J. Pires & M. Brotas Carvalho

  2. Grupo de Estudos de Catálise Heterogénea, Instituto Superior Técnico, Av. Rovisco Pais, 1096, Lisboa Codex, Portugal

    F. Lemos & F. Ramôa Ribeiro

  3. UACNRS 350, Catalyse en Chimie Organique, Université de Poitiers, 40 Av. du Recteur Pineau, 86011, Poitiers Cedex, France

    M. Guisnet

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  1. J. Pires
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  2. M. Brotas Carvalho
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  3. F. Lemos
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  4. F. Ramôa Ribeiro
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  5. M. Guisnet
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Pires, J., Carvalho, M.B., Lemos, F. et al. Influence of cerium and lanthanum cations on the thermal stability of HY zeolite. Characterization of the zeolitic structure by nitrogen adsorption. React Kinet Catal Lett 37, 49–55 (1988). https://doi.org/10.1007/BF02061709

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  • DOI: https://doi.org/10.1007/BF02061709

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