Hot water treatment effect in the elephant grass ashes calcinated at different temperatures
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1517-707620180003.0543 http://hdl.handle.net/11449/185183 |
Resumo: | In recent years, agro-industrial residues have focused attention in the scientific community as a new source of pozzolans. In Brazil, for example, one of the wastes generated from agro-industrial activities comes from elephant grass that is cultivated as biomass for energy cogeneration. This study evaluated the effect of hot water treatment on the crystalline structure of elephant grass ashes calcinated in two different temperature (700 and 900 degrees C). To study the chemical structure and the composition of the ashes the X-ray fluorescence (XRF) and X-ray diffractions (XRD) analyses were carried out. The results achieved in the present work shown that, elephant grass ashes meet the ASTM C-618 standard, for the minimum sum content of the silica (SiO2), aluminum (Al2O3) and iron (Fe2O3) oxides, of 50% to be considered as a pozzolanic material. The presence of an amorphous phase has been detected in all XRD patterns. The ashes calcinated at 700 degrees C showed lower crystallinity and the treatment with hot water decreased crystallite size, i.e., the material became more amorphous. On the other hand, the ashes calcinated at 900 degrees C, less reactive, had a lower content of K2O. Therefore, the hot water treatment was effective to reduce the potassium content in the ashes. Additionally, it contributed to reduce the crystallite size of silica in the ash calcinated at 700 degrees C, while the effect is contrary to the ash calcinated at 900 degrees C. |
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Hot water treatment effect in the elephant grass ashes calcinated at different temperaturesMineral additionbiomassamorphous formationpotassium leachingcrystallite sizeIn recent years, agro-industrial residues have focused attention in the scientific community as a new source of pozzolans. In Brazil, for example, one of the wastes generated from agro-industrial activities comes from elephant grass that is cultivated as biomass for energy cogeneration. This study evaluated the effect of hot water treatment on the crystalline structure of elephant grass ashes calcinated in two different temperature (700 and 900 degrees C). To study the chemical structure and the composition of the ashes the X-ray fluorescence (XRF) and X-ray diffractions (XRD) analyses were carried out. The results achieved in the present work shown that, elephant grass ashes meet the ASTM C-618 standard, for the minimum sum content of the silica (SiO2), aluminum (Al2O3) and iron (Fe2O3) oxides, of 50% to be considered as a pozzolanic material. The presence of an amorphous phase has been detected in all XRD patterns. The ashes calcinated at 700 degrees C showed lower crystallinity and the treatment with hot water decreased crystallite size, i.e., the material became more amorphous. On the other hand, the ashes calcinated at 900 degrees C, less reactive, had a lower content of K2O. Therefore, the hot water treatment was effective to reduce the potassium content in the ashes. Additionally, it contributed to reduce the crystallite size of silica in the ash calcinated at 700 degrees C, while the effect is contrary to the ash calcinated at 900 degrees C.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FZEA/USP (Brazil)IETcc/CSIC (Spain)CSICUniv Sao Paulo, Res Nucleus Mat Biosyst BIOSMAT, Pirassununga, SP, BrazilSao Paulo State Univ, Sch Engn, Dept Mat & Technol, Guaratingueta, SP, BrazilSao Paulo Fac Technol, Ctr Paula Souza, Sao Paulo, SP, BrazilCSIC, Eduardo Torroja Inst IETcc, Madrid, SpainSao Paulo State Univ, Sch Engn, Dept Mat & Technol, Guaratingueta, SP, BrazilFAPESP: 2013/50790-8FAPESP: 2011/16842-5FAPESP: 2016/07372-9FAPESP: 2013/23810-8FAPESP: 2012/51467-3CNPq: 150384/2016-5CNPq: 312151/2016-0CNPq: 306386/2013-5FZEA/USP (Brazil): 2013040043IETcc/CSIC (Spain): 2013040043CSIC: i-Link 0675-2013Univ Fed Rio De Janeiro, Lab HidrogenioUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Sao Paulo Fac TechnolCSICNakanishi, Erika YukariSantos, Valdemir dosCabral, Matheus RobertoSantos, Sergio Francisco [UNESP]Rodrigues, Michelle SantosFrias, MoisesSavastano Junior, Holmer2019-10-04T12:33:24Z2019-10-04T12:33:24Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10application/pdfhttp://dx.doi.org/10.1590/S1517-707620180003.0543Materia-rio De Janeiro. Rio De Janeiro Rj: Univ Fed Rio De Janeiro, Lab Hidrogenio, v. 23, n. 3, 10 p., 2018.1517-7076http://hdl.handle.net/11449/18518310.1590/S1517-707620180003.0543S1517-70762018000300461WOS:000452417200061S1517-70762018000300461.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMateria-rio De Janeiroinfo:eu-repo/semantics/openAccess2024-07-02T15:04:05Zoai:repositorio.unesp.br:11449/185183Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:31:02.313315Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures |
title |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures |
spellingShingle |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures Nakanishi, Erika Yukari Mineral addition biomass amorphous formation potassium leaching crystallite size |
title_short |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures |
title_full |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures |
title_fullStr |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures |
title_full_unstemmed |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures |
title_sort |
Hot water treatment effect in the elephant grass ashes calcinated at different temperatures |
author |
Nakanishi, Erika Yukari |
author_facet |
Nakanishi, Erika Yukari Santos, Valdemir dos Cabral, Matheus Roberto Santos, Sergio Francisco [UNESP] Rodrigues, Michelle Santos Frias, Moises Savastano Junior, Holmer |
author_role |
author |
author2 |
Santos, Valdemir dos Cabral, Matheus Roberto Santos, Sergio Francisco [UNESP] Rodrigues, Michelle Santos Frias, Moises Savastano Junior, Holmer |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) Sao Paulo Fac Technol CSIC |
dc.contributor.author.fl_str_mv |
Nakanishi, Erika Yukari Santos, Valdemir dos Cabral, Matheus Roberto Santos, Sergio Francisco [UNESP] Rodrigues, Michelle Santos Frias, Moises Savastano Junior, Holmer |
dc.subject.por.fl_str_mv |
Mineral addition biomass amorphous formation potassium leaching crystallite size |
topic |
Mineral addition biomass amorphous formation potassium leaching crystallite size |
description |
In recent years, agro-industrial residues have focused attention in the scientific community as a new source of pozzolans. In Brazil, for example, one of the wastes generated from agro-industrial activities comes from elephant grass that is cultivated as biomass for energy cogeneration. This study evaluated the effect of hot water treatment on the crystalline structure of elephant grass ashes calcinated in two different temperature (700 and 900 degrees C). To study the chemical structure and the composition of the ashes the X-ray fluorescence (XRF) and X-ray diffractions (XRD) analyses were carried out. The results achieved in the present work shown that, elephant grass ashes meet the ASTM C-618 standard, for the minimum sum content of the silica (SiO2), aluminum (Al2O3) and iron (Fe2O3) oxides, of 50% to be considered as a pozzolanic material. The presence of an amorphous phase has been detected in all XRD patterns. The ashes calcinated at 700 degrees C showed lower crystallinity and the treatment with hot water decreased crystallite size, i.e., the material became more amorphous. On the other hand, the ashes calcinated at 900 degrees C, less reactive, had a lower content of K2O. Therefore, the hot water treatment was effective to reduce the potassium content in the ashes. Additionally, it contributed to reduce the crystallite size of silica in the ash calcinated at 700 degrees C, while the effect is contrary to the ash calcinated at 900 degrees C. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 2019-10-04T12:33:24Z 2019-10-04T12:33:24Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1517-707620180003.0543 Materia-rio De Janeiro. Rio De Janeiro Rj: Univ Fed Rio De Janeiro, Lab Hidrogenio, v. 23, n. 3, 10 p., 2018. 1517-7076 http://hdl.handle.net/11449/185183 10.1590/S1517-707620180003.0543 S1517-70762018000300461 WOS:000452417200061 S1517-70762018000300461.pdf |
url |
http://dx.doi.org/10.1590/S1517-707620180003.0543 http://hdl.handle.net/11449/185183 |
identifier_str_mv |
Materia-rio De Janeiro. Rio De Janeiro Rj: Univ Fed Rio De Janeiro, Lab Hidrogenio, v. 23, n. 3, 10 p., 2018. 1517-7076 10.1590/S1517-707620180003.0543 S1517-70762018000300461 WOS:000452417200061 S1517-70762018000300461.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materia-rio De Janeiro |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
10 application/pdf |
dc.publisher.none.fl_str_mv |
Univ Fed Rio De Janeiro, Lab Hidrogenio |
publisher.none.fl_str_mv |
Univ Fed Rio De Janeiro, Lab Hidrogenio |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129328944250880 |