|
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. |
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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 |
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subject category |
Materials Science; Physics |
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unique article identifier |
WOS:000450594300163
|
