Location of Repository

Síntese da zeólita cancrenita a partir de caulim: uma alternativa viável à redução de impactos ambientais

By Anderson Joel Schwanke, Seliane Teresinha Spazzini, Fábio Garcia Penha and Sibele Berenice Castellã Pergher

Abstract

<div align="justify">A síntese da zeólita cancrenita foi realizada aproveitando três caulins denominados AD44, Mina e Reagen, utilizados em substituição às fontes de silício e alumínio já empregadas na síntese de peneiras moleculares, geralmente caras e que necessitam de tratamentos químicos para sua obtenção. Os dois primeiros são caulins naturais e o ultimo é um caulim comercial. Estas argilas foram usadas na forma natural e calcinada a 900oC. As argilas e os materiais obtidos foram caracterizados por difração de raios-X, medidas de área superficial BET e microscopia eletrônica de varredura. Os resultados mostraram que as argilas calcinadas conduzem à fase cancrenita com maior cristalinidade quando comparada com as argilas naturais. Diferentes fases, tais como sodalita e mesofases entre cancrenita e sodalita também são formadas.<br><br>Abstract The synthesis of cancrinite zeolite was accomplished by three types of kaolins called AD44, Mina and Reagen. These materials were used as aluminium and silicon sources in substitution of expensive reactants. The first two types are natural kaolin and the last one is a commercial. These clays were used in natural and calcinated (900ºC) forms. The clays and the obtained materials were characterized by X-ray diffraction (XRD) specific superficial area (BET) and scanning electronic microscopy (SEM). The results showed that calcinated clays lead to cancrinite phases with higher cristallinity when compared with the natural clays. Different phases such as sodalite and mesophases between sodalite and cancrinite were formed too.</div

Topics: Cancrenita, zeólita, caulim, Technology (General), T1-995, Technology, T, DOAJ:Technology (General), DOAJ:Technology and Engineering, Industrial engineering. Management engineering, T55.4-60.8
Publisher: Universidade de Santa Cruz do Sul
Year: 2011
OAI identifier: oai:doaj.org/article:20af25df664e4fdf90b47b5b0bdaf599
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://doaj.org/toc/1982-6753 (external link)
  • https://doaj.org/toc/1415-6229 (external link)
  • http://online.unisc.br/seer/in... (external link)
  • https://doaj.org/article/20af2... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.