Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods

Detalhes bibliográficos
Autor(a) principal: Fernandes,Iara Janaína
Data de Publicação: 2017
Outros Autores: Calheiro,Daiane, Sánchez,Felipe A. L., Camacho,Alini Luísa Diehl, Rocha,Tatiana Louise Avila de Campos, Moraes,Carlos Alberto Mendes, Sousa,Vânia Caldas de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800512
Resumo: As a byproduct of the combustion of rice husk to generate energy, rice husk ash (RHA) is formed by silica and carbon, apart from small amounts of other constituents. Several treatments can be used to increase the purity of the silica obtained, or even produce pure silica. The present study tested the efficiency of different techniques to obtain silica, characterizing and comparing the silicas obtained from RHA. A literature review was conducted, and then selected techniques were used to produce silica, which was characterized by XRF, XRD, particle sizing, specific weight, specific surface area, total carbon, and SEM. The literature review showed that most techniques include a pretreatment like acid or alkaline leaching followed by thermal treatment to increase the amount of silica produced by reduction of carbonaceous materials. The results showed that it is possible to produce silica from RHA using simple methods, and that these produced silica with purity above 98%. The treatments that afforded the best results were acid leaching followed by thermal treatment at 800ºC, and alkaline extraction at low temperature, with silica purity of 99.3% and 99.6%, respectively.
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spelling Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methodsrice husk ashsilicathermal treatmentAs a byproduct of the combustion of rice husk to generate energy, rice husk ash (RHA) is formed by silica and carbon, apart from small amounts of other constituents. Several treatments can be used to increase the purity of the silica obtained, or even produce pure silica. The present study tested the efficiency of different techniques to obtain silica, characterizing and comparing the silicas obtained from RHA. A literature review was conducted, and then selected techniques were used to produce silica, which was characterized by XRF, XRD, particle sizing, specific weight, specific surface area, total carbon, and SEM. The literature review showed that most techniques include a pretreatment like acid or alkaline leaching followed by thermal treatment to increase the amount of silica produced by reduction of carbonaceous materials. The results showed that it is possible to produce silica from RHA using simple methods, and that these produced silica with purity above 98%. The treatments that afforded the best results were acid leaching followed by thermal treatment at 800ºC, and alkaline extraction at low temperature, with silica purity of 99.3% and 99.6%, respectively.ABM, ABC, ABPol2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800512Materials Research v.20 suppl.2 2017reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2016-1043info:eu-repo/semantics/openAccessFernandes,Iara JanaínaCalheiro,DaianeSánchez,Felipe A. L.Camacho,Alini Luísa DiehlRocha,Tatiana Louise Avila de CamposMoraes,Carlos Alberto MendesSousa,Vânia Caldas deeng2018-04-12T00:00:00Zoai:scielo:S1516-14392017000800512Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-04-12T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
title Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
spellingShingle Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
Fernandes,Iara Janaína
rice husk ash
silica
thermal treatment
title_short Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
title_full Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
title_fullStr Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
title_full_unstemmed Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
title_sort Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
author Fernandes,Iara Janaína
author_facet Fernandes,Iara Janaína
Calheiro,Daiane
Sánchez,Felipe A. L.
Camacho,Alini Luísa Diehl
Rocha,Tatiana Louise Avila de Campos
Moraes,Carlos Alberto Mendes
Sousa,Vânia Caldas de
author_role author
author2 Calheiro,Daiane
Sánchez,Felipe A. L.
Camacho,Alini Luísa Diehl
Rocha,Tatiana Louise Avila de Campos
Moraes,Carlos Alberto Mendes
Sousa,Vânia Caldas de
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Fernandes,Iara Janaína
Calheiro,Daiane
Sánchez,Felipe A. L.
Camacho,Alini Luísa Diehl
Rocha,Tatiana Louise Avila de Campos
Moraes,Carlos Alberto Mendes
Sousa,Vânia Caldas de
dc.subject.por.fl_str_mv rice husk ash
silica
thermal treatment
topic rice husk ash
silica
thermal treatment
description As a byproduct of the combustion of rice husk to generate energy, rice husk ash (RHA) is formed by silica and carbon, apart from small amounts of other constituents. Several treatments can be used to increase the purity of the silica obtained, or even produce pure silica. The present study tested the efficiency of different techniques to obtain silica, characterizing and comparing the silicas obtained from RHA. A literature review was conducted, and then selected techniques were used to produce silica, which was characterized by XRF, XRD, particle sizing, specific weight, specific surface area, total carbon, and SEM. The literature review showed that most techniques include a pretreatment like acid or alkaline leaching followed by thermal treatment to increase the amount of silica produced by reduction of carbonaceous materials. The results showed that it is possible to produce silica from RHA using simple methods, and that these produced silica with purity above 98%. The treatments that afforded the best results were acid leaching followed by thermal treatment at 800ºC, and alkaline extraction at low temperature, with silica purity of 99.3% and 99.6%, respectively.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800512
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800512
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2016-1043
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.20 suppl.2 2017
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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