Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2

Detalhes bibliográficos
Autor(a) principal: Cavalcante,A. M.
Data de Publicação: 2005
Outros Autores: Torres,L. G., Coelho,G. L. V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Chemical Engineering
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322005000100008
Resumo: Modified clays were used to remove ethyl acetate from aqueous solutions. These clays were regenerated using supercritical CO2. Structural changes in the montmorillonite clay after treatment with quaternary amines were studied. The surface properties of the modified clay changed from highly hydrophilic to highly organophilic. The clay was regenerated by percolation of a stream of CO2 through the porous montmorillonite matrix. Different pressures and temperatures were employed, resulting in different fluid conditions (gas, liquid, and supercritical). The experimental data was fitted with a simplified model. The best desorption result was found under supercritical conditions. A crossover effect was observed. The capacity of the modified clay as a pollutant attenuator remained almost unchanged after a regeneration cycle.
id ABEQ-1_4026f3c2ae582a17934f1c64e398f9c8
oai_identifier_str oai:scielo:S0104-66322005000100008
network_acronym_str ABEQ-1
network_name_str Brazilian Journal of Chemical Engineering
repository_id_str
spelling Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2Ethyl acetate adsorptionRegeneration of modified claysSupercritical CO2Modified clays were used to remove ethyl acetate from aqueous solutions. These clays were regenerated using supercritical CO2. Structural changes in the montmorillonite clay after treatment with quaternary amines were studied. The surface properties of the modified clay changed from highly hydrophilic to highly organophilic. The clay was regenerated by percolation of a stream of CO2 through the porous montmorillonite matrix. Different pressures and temperatures were employed, resulting in different fluid conditions (gas, liquid, and supercritical). The experimental data was fitted with a simplified model. The best desorption result was found under supercritical conditions. A crossover effect was observed. The capacity of the modified clay as a pollutant attenuator remained almost unchanged after a regeneration cycle.Brazilian Society of Chemical Engineering2005-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322005000100008Brazilian Journal of Chemical Engineering v.22 n.1 2005reponame:Brazilian Journal of Chemical Engineeringinstname:Associação Brasileira de Engenharia Química (ABEQ)instacron:ABEQ10.1590/S0104-66322005000100008info:eu-repo/semantics/openAccessCavalcante,A. M.Torres,L. G.Coelho,G. L. V.eng2005-03-14T00:00:00Zoai:scielo:S0104-66322005000100008Revistahttps://www.scielo.br/j/bjce/https://old.scielo.br/oai/scielo-oai.phprgiudici@usp.br||rgiudici@usp.br1678-43830104-6632opendoar:2005-03-14T00:00Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)false
dc.title.none.fl_str_mv Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
title Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
spellingShingle Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
Cavalcante,A. M.
Ethyl acetate adsorption
Regeneration of modified clays
Supercritical CO2
title_short Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
title_full Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
title_fullStr Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
title_full_unstemmed Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
title_sort Adsorption of ethyl acetate onto modified clays and its regeneration with supercritical CO2
author Cavalcante,A. M.
author_facet Cavalcante,A. M.
Torres,L. G.
Coelho,G. L. V.
author_role author
author2 Torres,L. G.
Coelho,G. L. V.
author2_role author
author
dc.contributor.author.fl_str_mv Cavalcante,A. M.
Torres,L. G.
Coelho,G. L. V.
dc.subject.por.fl_str_mv Ethyl acetate adsorption
Regeneration of modified clays
Supercritical CO2
topic Ethyl acetate adsorption
Regeneration of modified clays
Supercritical CO2
description Modified clays were used to remove ethyl acetate from aqueous solutions. These clays were regenerated using supercritical CO2. Structural changes in the montmorillonite clay after treatment with quaternary amines were studied. The surface properties of the modified clay changed from highly hydrophilic to highly organophilic. The clay was regenerated by percolation of a stream of CO2 through the porous montmorillonite matrix. Different pressures and temperatures were employed, resulting in different fluid conditions (gas, liquid, and supercritical). The experimental data was fitted with a simplified model. The best desorption result was found under supercritical conditions. A crossover effect was observed. The capacity of the modified clay as a pollutant attenuator remained almost unchanged after a regeneration cycle.
publishDate 2005
dc.date.none.fl_str_mv 2005-03-01
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=S0104-66322005000100008
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322005000100008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0104-66322005000100008
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 Brazilian Society of Chemical Engineering
publisher.none.fl_str_mv Brazilian Society of Chemical Engineering
dc.source.none.fl_str_mv Brazilian Journal of Chemical Engineering v.22 n.1 2005
reponame:Brazilian Journal of Chemical Engineering
instname:Associação Brasileira de Engenharia Química (ABEQ)
instacron:ABEQ
instname_str Associação Brasileira de Engenharia Química (ABEQ)
instacron_str ABEQ
institution ABEQ
reponame_str Brazilian Journal of Chemical Engineering
collection Brazilian Journal of Chemical Engineering
repository.name.fl_str_mv Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)
repository.mail.fl_str_mv rgiudici@usp.br||rgiudici@usp.br
_version_ 1754213171857457152