Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation

Bibliographic Details
Main Author: Holtz, Raphael Dias
Publication Date: 2008
Other Authors: Oliveira, Sérgio Botelho de, Fraga, Marco A., Varela, Maria do Carmo Rangel Santos
Format: Article
Language: eng
Source: Repositório Institucional da UFBA
Download full: http://www.repositorio.ufba.br/ri/handle/ri/5996
Summary: Acesso restrito: Texto completo. p. 79-85
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spelling Holtz, Raphael DiasOliveira, Sérgio Botelho deFraga, Marco A.Varela, Maria do Carmo Rangel SantosHoltz, Raphael DiasOliveira, Sérgio Botelho deFraga, Marco A.Varela, Maria do Carmo Rangel Santos2012-05-30T17:47:43Z20080926-860Xhttp://www.repositorio.ufba.br/ri/handle/ri/5996v. 350, n. 1Acesso restrito: Texto completo. p. 79-85The preparation and characterization of activated carbon obtained from the sulfonated styrenedivinylbenzene copolymer and the effect of vanadium and magnesium on its catalytic activity and selectivity to styrene were described. These new catalysts were evaluated in ethylbenzene dehydrogenation without steam to produce styrene, an important intermediate for petrochemical industries. It was found that the activated carbon is active and selective to styrene, a fact which was related to the presence of quinone groups on the surface. The addition of vanadium increased the activity even more and this was assigned to the activity of vanadium in dehydrogenation reactions as well as to an increase of the amount of oxygen groups on the surface. However, no significant effect of vanadium on the selectivity to styrene was found. Magnesium increased the quinone groups on surface leading to an increase of the initial activity of activated carbon-supported vanadium depending on its amount, but the catalysts deactivated during reaction, a fact which was related to coke deposition; at the end of reaction no effect of magnesium on the activity and selectivity was found. The catalysts were more active than a commercial hematite-based one, evaluated in the presence and in the absence of steam. The catalyst with 5% of vanadium was the most promising sample, showing the highest ethylbenzene conversion which was three times the value obtained with the commercial catalyst in the presence of steam. This result is especially advantageous for the economy of the process, since the addition of superheated steam can be avoided during reaction, saving energy for the process.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-05-30T17:47:42Z No. of bitstreams: 1 __ac.els-cdn.com_S092686...71d6e5064f664bcdc08b03a5f9545.pdf: 350318 bytes, checksum: 237f53f900e29e237907f9b36197aabf (MD5)Made available in DSpace on 2012-05-30T17:47:43Z (GMT). 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dc.title.pt_BR.fl_str_mv Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
dc.title.alternative.pt_BR.fl_str_mv Applied Catalysis A-General
title Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
spellingShingle Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
Holtz, Raphael Dias
Activated carbon
Styrene
Ethylbenzene dehydrogenation
title_short Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
title_full Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
title_fullStr Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
title_full_unstemmed Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
title_sort Synthesis and characterization of polymeric activated carbon-supported vanadium and magnesium catalysts for ethylbenzene dehydrogenation
author Holtz, Raphael Dias
author_facet Holtz, Raphael Dias
Oliveira, Sérgio Botelho de
Fraga, Marco A.
Varela, Maria do Carmo Rangel Santos
author_role author
author2 Oliveira, Sérgio Botelho de
Fraga, Marco A.
Varela, Maria do Carmo Rangel Santos
author2_role author
author
author
dc.contributor.author.fl_str_mv Holtz, Raphael Dias
Oliveira, Sérgio Botelho de
Fraga, Marco A.
Varela, Maria do Carmo Rangel Santos
Holtz, Raphael Dias
Oliveira, Sérgio Botelho de
Fraga, Marco A.
Varela, Maria do Carmo Rangel Santos
dc.subject.por.fl_str_mv Activated carbon
Styrene
Ethylbenzene dehydrogenation
topic Activated carbon
Styrene
Ethylbenzene dehydrogenation
description Acesso restrito: Texto completo. p. 79-85
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-05-30T17:47:43Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/5996
dc.identifier.issn.none.fl_str_mv 0926-860X
dc.identifier.number.pt_BR.fl_str_mv v. 350, n. 1
identifier_str_mv 0926-860X
v. 350, n. 1
url http://www.repositorio.ufba.br/ri/handle/ri/5996
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.apcata.2008.08.002
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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