Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments

Detalhes bibliográficos
Autor(a) principal: Cordeiro,Guilherme Chagas
Data de Publicação: 2017
Outros Autores: Vieira,Amanda Pereira, Lopes,Érica da Silva
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000300264
Resumo: This work systematically describes a laboratory study on different pretreatments of sugar cane straw to produce pozzolanic ash. Two procedures were used to accelerate the hydrolysis of celluloses and hemicelluloses and remove metallic impurities present in significant levels in sugar cane straw: hot water washing and acid leaching. Proximate analysis by thermogravimetry was carried out to cover volatile matter, fixed carbon, and ash content of the different straws. Detailed measurements of X-ray diffraction, oxide percentages, loss on ignition, and BET specific surface area were performed to compare hot water washed, acid leached, and non-pretreated ashes, after controlled processes of burning and grinding. The pozzolanic activity of the ashes was evaluated from the modified Chapelle and electrical conductivity methods. The results revealed that ashes with a high content of amorphous silica were produced, in spite of the straw pretreatments. However, both straw pretreatments induced a significant increase in pozzolanic activity, mainly associated with the removal of impurities, especially CaO, SO3, K2O, and carbon compounds. The effect of the hot water washing treatment was relatively small in relation to the acid leaching, but the hot washed ash was significantly more pozzolanic than non-treated ash.
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spelling Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatmentssugar cane straw ashpozzolanpozzolanic activityleaching acid pretreatmentThis work systematically describes a laboratory study on different pretreatments of sugar cane straw to produce pozzolanic ash. Two procedures were used to accelerate the hydrolysis of celluloses and hemicelluloses and remove metallic impurities present in significant levels in sugar cane straw: hot water washing and acid leaching. Proximate analysis by thermogravimetry was carried out to cover volatile matter, fixed carbon, and ash content of the different straws. Detailed measurements of X-ray diffraction, oxide percentages, loss on ignition, and BET specific surface area were performed to compare hot water washed, acid leached, and non-pretreated ashes, after controlled processes of burning and grinding. The pozzolanic activity of the ashes was evaluated from the modified Chapelle and electrical conductivity methods. The results revealed that ashes with a high content of amorphous silica were produced, in spite of the straw pretreatments. However, both straw pretreatments induced a significant increase in pozzolanic activity, mainly associated with the removal of impurities, especially CaO, SO3, K2O, and carbon compounds. The effect of the hot water washing treatment was relatively small in relation to the acid leaching, but the hot washed ash was significantly more pozzolanic than non-treated ash.Sociedade Brasileira de Química2017-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000300264Química Nova v.40 n.3 2017reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0100-4042.20170002info:eu-repo/semantics/openAccessCordeiro,Guilherme ChagasVieira,Amanda PereiraLopes,Érica da Silvaeng2017-05-05T00:00:00Zoai:scielo:S0100-40422017000300264Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2017-05-05T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
title Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
spellingShingle Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
Cordeiro,Guilherme Chagas
sugar cane straw ash
pozzolan
pozzolanic activity
leaching acid pretreatment
title_short Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
title_full Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
title_fullStr Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
title_full_unstemmed Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
title_sort Study on the pozzolanic activity of sugar cane straw ash produced using different pretreatments
author Cordeiro,Guilherme Chagas
author_facet Cordeiro,Guilherme Chagas
Vieira,Amanda Pereira
Lopes,Érica da Silva
author_role author
author2 Vieira,Amanda Pereira
Lopes,Érica da Silva
author2_role author
author
dc.contributor.author.fl_str_mv Cordeiro,Guilherme Chagas
Vieira,Amanda Pereira
Lopes,Érica da Silva
dc.subject.por.fl_str_mv sugar cane straw ash
pozzolan
pozzolanic activity
leaching acid pretreatment
topic sugar cane straw ash
pozzolan
pozzolanic activity
leaching acid pretreatment
description This work systematically describes a laboratory study on different pretreatments of sugar cane straw to produce pozzolanic ash. Two procedures were used to accelerate the hydrolysis of celluloses and hemicelluloses and remove metallic impurities present in significant levels in sugar cane straw: hot water washing and acid leaching. Proximate analysis by thermogravimetry was carried out to cover volatile matter, fixed carbon, and ash content of the different straws. Detailed measurements of X-ray diffraction, oxide percentages, loss on ignition, and BET specific surface area were performed to compare hot water washed, acid leached, and non-pretreated ashes, after controlled processes of burning and grinding. The pozzolanic activity of the ashes was evaluated from the modified Chapelle and electrical conductivity methods. The results revealed that ashes with a high content of amorphous silica were produced, in spite of the straw pretreatments. However, both straw pretreatments induced a significant increase in pozzolanic activity, mainly associated with the removal of impurities, especially CaO, SO3, K2O, and carbon compounds. The effect of the hot water washing treatment was relatively small in relation to the acid leaching, but the hot washed ash was significantly more pozzolanic than non-treated ash.
publishDate 2017
dc.date.none.fl_str_mv 2017-04-01
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=S0100-40422017000300264
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422017000300264
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.21577/0100-4042.20170002
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.40 n.3 2017
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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