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

被引：58

作者：

De Rossi, A. ^{[1
,2
]}

Simao, L. ^{[3
]}

Ribeiro, M. J. ^{[4
]}

Novais, R. M. ^{[5
]}

Labrincha, J. A. ^{[5
]}

Hotza, D. ^{[1
,2
,3
]}

Moreira, R. F. P. M. ^{[1
,2
]}

机构：

[1] Fed Univ Santa Catarina UFSC, Dept Chem & Food Engn EQA, BR-88040900 Florianopolis, SC, Brazil

[2] Fed Univ Santa Catarina UFSC, Grad Program Chem Engn POSENQ, BR-88040900 Florianopolis, SC, Brazil

[3] Fed Univ Santa Catarina UFSC, Grad Program Mat Sci & Engn PGMAT, BR-88040900 Florianopolis, SC, Brazil

[4] Polytech Inst Viana do Castelo IPVC, Mat Sci Res & Dev Ctr UIDM, P-4900348 Viana Do Castelo, Portugal

[5] Univ Aveiro, Dept Mat & Ceram Engn, Aveiro Inst Mat CICECO, Campus Univ Santiago, P-3810193 Aveiro, Portugal

来源：

MATERIALS LETTERS | 2019年 / 236卷

关键词：

Fly ash; Metakaolin; Geopolymer; Zeolite; Porosity; Adsorption; FAUJASITE BLOCK;

D O I：

10.1016/j.matlet.2018.11.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：644 / 648

页数：5

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