In-situ synthesis of zeolites by geopolymerization of biomass fly ash and metakaolin
authors De Rossi, A; Simao, L; Ribeiro, MJ; Novais, RM; Labrincha, JA; Hotza, D; Moreira, RFPM
nationality International
journal MATERIALS LETTERS
author keywords Fly ash; Metakaolin; Geopolymer; Zeolite; Porosity; Adsorption
keywords FAUJASITE BLOCK
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.
publisher ELSEVIER SCIENCE BV
issn 0167-577X
year published 2019
volume 236
beginning page 644
ending page 648
digital object identifier (doi) 10.1016/j.matlet.2018.11.016
web of science category Materials Science, Multidisciplinary; Physics, Applied
subject category Materials Science; Physics
unique article identifier WOS:000450594300163
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journal impact factor 2.687
5 year journal impact factor 2.452
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