Characterization of Silica Produced from Rice Husk Ash: Comparison of Purification and Processing Methods
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
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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Materials research (São Carlos. Online) |
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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 |
_version_ |
1754212671630082048 |