The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash

Q3 Materials Science

Cerâmica Pub Date : 2022-09-01 DOI:10.1590/0366-69132022683873322

T. Bertolini, D. Fungaro, A. Mahmoud

{"title":"The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash","authors":"T. Bertolini, D. Fungaro, A. Mahmoud","doi":"10.1590/0366-69132022683873322","DOIUrl":null,"url":null,"abstract":"Pelletization of zeolitic materials is required to facilitate their practical industrial and commercial applications. Zeolite-NaA was synthesized from fly ash by the fusion method and shaped into spherical granules. Bentonite, kaolinite, and a combination of bentonite with kaolinite were tested as binders with different contents from 5 to 10 wt%. The pellet formation was optimized. The physicochemical properties of binders, zeolite powder, and zeolite granular were characterized by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption/desorption isotherm, and scanning electron microscopy (SEM) among other techniques. Deformation and breakage behavior of spherical granulates by compression was also studied. The best performance was obtained by the pellet with 10% bentonite with satisfactory mechanical strength and water resistance. The XRD and SEM results revealed NaA zeolite granular with a typical cubic shape and high crystallinity formed on the surface of bentonite. This result presents a potential use of the coal fly ash to obtain pelletized NaA zeolite following the principles of circular economy and the s ustainable development goals ( SDGs ), particularly SDG 12 .","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cerâmica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1590/0366-69132022683873322","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Materials Science","Score":null,"Total":0}

引用次数: 1

Abstract

Pelletization of zeolitic materials is required to facilitate their practical industrial and commercial applications. Zeolite-NaA was synthesized from fly ash by the fusion method and shaped into spherical granules. Bentonite, kaolinite, and a combination of bentonite with kaolinite were tested as binders with different contents from 5 to 10 wt%. The pellet formation was optimized. The physicochemical properties of binders, zeolite powder, and zeolite granular were characterized by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption/desorption isotherm, and scanning electron microscopy (SEM) among other techniques. Deformation and breakage behavior of spherical granulates by compression was also studied. The best performance was obtained by the pellet with 10% bentonite with satisfactory mechanical strength and water resistance. The XRD and SEM results revealed NaA zeolite granular with a typical cubic shape and high crystallinity formed on the surface of bentonite. This result presents a potential use of the coal fly ash to obtain pelletized NaA zeolite following the principles of circular economy and the s ustainable development goals ( SDGs ), particularly SDG 12 .

查看原文本刊更多论文

膨润土和高岭土分别和复合作为粘结剂对粉煤灰NaA沸石成球的影响

沸石材料的颗粒化是促进其实际工业和商业应用所必需的。以粉煤灰为原料，采用熔融法合成了NaA沸石，并将其成型为球形颗粒。膨润土、高岭石以及膨润土与高岭石的组合被测试为具有5至10wt%的不同含量的粘合剂。对颗粒的形成进行了优化。通过X射线荧光光谱（XRF）、X射线衍射（XRD）、傅立叶变换红外光谱（FTIR）、氮吸附/脱附等温线和扫描电子显微镜（SEM）等技术对粘合剂、沸石粉末和沸石颗粒的物理化学性质进行了表征。研究了球形颗粒压缩变形和破碎行为。添加10%膨润土的球团获得了最佳性能，具有良好的机械强度和耐水性。XRD和SEM结果表明，膨润土表面形成了典型的立方形状、结晶度高的NaA沸石颗粒。这一结果表明，根据循环经济原则和可持续发展目标（SDG），特别是SDG 12，粉煤灰有可能用于制备NaA沸石颗粒。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Cerâmica Materials Science-Ceramics and Composites

CiteScore

1.90

自引率

0.00%

发文量

审稿时长

10 weeks

期刊介绍： A Revista Cerâmica, órgão oficial da Associação Brasileira de Cerâmica (ABCERAM) publica contribuições originais de interesse na área de cerâmica, compreendendo arte cerâmica, abrasivos, biocerâmicas, cerâmicas avançadas, cerâmica branca, cerâmica de mesa, cerâmica eletroeletrônica, cerâmica estrutural, cerâmica magnética, cerâmica nuclear, cerâmica óptica, cerâmica química, cerâmica termomecânica, cerâmica vermelha, cimento, compósitos de matriz cerâmica, materiais refratários, materiais de revestimento, matérias-primas, vidrados, vidros e vitrocerâmicas, análise microestrutural, ciência básica, instrumentação, processos de fabricação, síntese de pós, técnicas de caracterização etc.