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
author keywords Fly ash; Metakaolin; Geopolymer; Zeolite; Porosity; Adsorption
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.
issn 0167-577X
isbn 1873-4979
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 analysis (jcr 2019):
journal impact factor 3.204
5 year journal impact factor 2.785
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