Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , |
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=S0104-66321999000300008 |
Resumo: | In the present work polyurethane membranes obtained from different polyester/MDI-based polymers were used to separate benzene/n-hexane mixtures by pervaporation. In pervaporation experiments, with a 50% wt feed at room temperature, permeate fluxes in the range of 0.3 to 3.2 Kg/m2h (10 <FONT FACE="Symbol">m</font>m membrane thickness) and selectivity in the range of 3.8 to 5.6 were obtained. The permeate was always enriched in benzene. Taking into account the compromise between flux and selectivity, the best performance membrane was selected for complementary sorption and pervaporation experiments. Results show that selectivity increases and the permeation flux decreases when the benzene concentration in the feed decreases. In the present application, results also show that sorption is the main factor for selectivity. Using the distillation azeotropic mixture as feed, almost no influence of temperature on selectivity was observed in the range of 25oC to 56oC. The permeate flux increases seven-fold, while selectivity remains constant near 8.0. |
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Brazilian Journal of Chemical Engineering |
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Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranesPervaporationpolyurethane membranesorganic separationIn the present work polyurethane membranes obtained from different polyester/MDI-based polymers were used to separate benzene/n-hexane mixtures by pervaporation. In pervaporation experiments, with a 50% wt feed at room temperature, permeate fluxes in the range of 0.3 to 3.2 Kg/m2h (10 <FONT FACE="Symbol">m</font>m membrane thickness) and selectivity in the range of 3.8 to 5.6 were obtained. The permeate was always enriched in benzene. Taking into account the compromise between flux and selectivity, the best performance membrane was selected for complementary sorption and pervaporation experiments. Results show that selectivity increases and the permeation flux decreases when the benzene concentration in the feed decreases. In the present application, results also show that sorption is the main factor for selectivity. Using the distillation azeotropic mixture as feed, almost no influence of temperature on selectivity was observed in the range of 25oC to 56oC. The permeate flux increases seven-fold, while selectivity remains constant near 8.0.Brazilian Society of Chemical Engineering1999-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66321999000300008Brazilian Journal of Chemical Engineering v.16 n.3 1999reponame:Brazilian Journal of Chemical Engineeringinstname:Associação Brasileira de Engenharia Química (ABEQ)instacron:ABEQ10.1590/S0104-66321999000300008info:eu-repo/semantics/openAccessCUNHA,V. S.NOBREGA,R.HABERT,A. C.eng1999-12-16T00:00:00Zoai:scielo:S0104-66321999000300008Revistahttps://www.scielo.br/j/bjce/https://old.scielo.br/oai/scielo-oai.phprgiudici@usp.br||rgiudici@usp.br1678-43830104-6632opendoar:1999-12-16T00:00Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)false |
dc.title.none.fl_str_mv |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes |
title |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes |
spellingShingle |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes CUNHA,V. S. Pervaporation polyurethane membranes organic separation |
title_short |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes |
title_full |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes |
title_fullStr |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes |
title_full_unstemmed |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes |
title_sort |
Fractionation of benzene/n-hexane mixtures by pervaporation using polyurethane membranes |
author |
CUNHA,V. S. |
author_facet |
CUNHA,V. S. NOBREGA,R. HABERT,A. C. |
author_role |
author |
author2 |
NOBREGA,R. HABERT,A. C. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
CUNHA,V. S. NOBREGA,R. HABERT,A. C. |
dc.subject.por.fl_str_mv |
Pervaporation polyurethane membranes organic separation |
topic |
Pervaporation polyurethane membranes organic separation |
description |
In the present work polyurethane membranes obtained from different polyester/MDI-based polymers were used to separate benzene/n-hexane mixtures by pervaporation. In pervaporation experiments, with a 50% wt feed at room temperature, permeate fluxes in the range of 0.3 to 3.2 Kg/m2h (10 <FONT FACE="Symbol">m</font>m membrane thickness) and selectivity in the range of 3.8 to 5.6 were obtained. The permeate was always enriched in benzene. Taking into account the compromise between flux and selectivity, the best performance membrane was selected for complementary sorption and pervaporation experiments. Results show that selectivity increases and the permeation flux decreases when the benzene concentration in the feed decreases. In the present application, results also show that sorption is the main factor for selectivity. Using the distillation azeotropic mixture as feed, almost no influence of temperature on selectivity was observed in the range of 25oC to 56oC. The permeate flux increases seven-fold, while selectivity remains constant near 8.0. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-09-01 |
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=S0104-66321999000300008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66321999000300008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0104-66321999000300008 |
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.16 n.3 1999 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_ |
1754213170418810880 |