Troca iônica no estado sólido de európio3+ em zeólita Y: influência do tempo de reação

Química Nova

Eduardo J. Nassar²  Osvaldo A. Serra²  Eduardo F. Souza-aguiar¹ 

[1] ,USP FFCLRP Departamento de QuímicaRibeirão Preto SP

关键词: europium;    Y zeolites;    ion exchange;   

DOI  :  10.1590/S0100-40421998000200002

来源: SciELO

【 摘 要 】

Rare earth elements supported in zeolites are the most important catalysts in the fluid cracking of petroleum. The solid state ion exchange of Eu3+ in Y zeolite was investigated. First of all, the hydrated EuCl3 was well mixed in a ball mill and was then heated at 300ºC for different times. The quantitative determination of Eu3+ showed that the degree of ion exchange depends on the reaction time at constant temperature, being ~95% in 4 h. The X-ray study showed that the crystallinity of the zeolite is little affected by the exchange procedure. The study of spectroscopic properties of Eu3+, emission spectra and lifetime, give information about the migration and position of the ion in the zeolite cages.

【 授权许可】

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