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

dc.creator	Nassar Eduardo J.
dc.creator	Serra Osvaldo A.
dc.creator	Souza-Aguiar Eduardo F.
dc.date	1998
dc.date.accessioned	2013-05-30T10:45:40Z
dc.date.available	2013-05-30T10:45:40Z
dc.date.issued	2013-05-30
dc.identifier	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000200002
dc.identifier	http://www.doaj.org/doaj?func=openurl&genre=article&issn=01004042&date=1998&volume=21&issue=2&spage=121
dc.identifier.uri	http://koha.mediu.edu.my:8181/jspui/handle/123456789/4175
dc.description	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.
dc.publisher	Sociedade Brasileira de Química
dc.source	Química Nova
dc.subject	europium
dc.subject	Y zeolites
dc.subject	ion exchange
dc.title	Troca iônica no estado sólido de európio3+ em zeólita Y: influência do tempo de reação

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