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http://dspace.mediu.edu.my:8181/xmlui/handle/123456789/4175| Title: | Troca iônica no estado sólido de európio3+ em zeólita Y: influência do tempo de reação |
| Keywords: | europium Y zeolites ion exchange |
| Issue Date: | 30-May-2013 |
| Publisher: | Sociedade Brasileira de Química |
| 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. |
| URI: | http://koha.mediu.edu.my:8181/jspui/handle/123456789/4175 |
| Other Identifiers: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000200002 http://www.doaj.org/doaj?func=openurl&genre=article&issn=01004042&date=1998&volume=21&issue=2&spage=121 |
| Appears in Collections: | Chemistry |
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