In-situ synthesis of zeolites by geopolymerization of biomass fly ash and metakaolin

abstract

This study aims to evaluate the in-situ synthesis of zeolites through geopolymerization of biomass fly ash wastes at low temperature in a hermetic container. The raw materials were activated using a mixture of sodium silicate and sodium hydroxide, and then the specimens cured at 60 degrees C to obtain zeolite-containing geopolymers. Hydrogen peroxide (H2O2) was used as a porogenic agent. X-ray diffractograms showed the presence of faujasite zeolites regardless of the added H2O2 content. P zeolite was formed without porogenic agent addition, resulting in increase in the surface area (56.35 m(2)/g) in comparison with samples cured in room conditions (40.69 m(2)/g). The identified zeolites and the mechanical strength (up to similar to 10 MPa) suggest applications as separation membranes or filters. (C) 2018 Elsevier B.V. All rights reserved.

keywords

FAUJASITE BLOCK

subject category

Materials Science; Physics

authors

De Rossi, A; Simao, L; Ribeiro, MJ; Novais, RM; Labrincha, JA; Hotza, D; Moreira, RFPM

our authors

acknowledgements

The authors are very grateful to the Brazilian agency Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) as well as to the Portuguese agency Fundacao para a Ciencia e Tecnologia (FCT) for financial funding.

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".