Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition

Bibliographic Details
Main Author: Sales, Emerson Andrade
Publication Date: 2000
Other Authors: Mendes, Mario de Jesus, Bozon Verduraz, François
Format: Article
Language: eng
Source: Repositório Institucional da UFBA
Download full: http://www.repositorio.ufba.br/ri/handle/ri/7282
Summary: p.96–105
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spelling Sales, Emerson AndradeMendes, Mario de JesusBozon Verduraz, FrançoisSales, Emerson AndradeMendes, Mario de JesusBozon Verduraz, François2012-11-26T21:11:19Z2000-100021-9517http://www.repositorio.ufba.br/ri/handle/ri/7282v. 195, n. 1p.96–105The liquid-phase hydrogenation of hexa-1,5-diene and hexa-1,3-diene on alumina-supported palladium catalysts is investigated with special attention paid to the effects of tin or silver addition. All catalysts show a global selectivity near 100%; these high values persist at total conversion when the reactant is hexa-1,3-diene but decrease to about 70% in the case of hexa-1,5-diene. In the hexa-1,5-diene hydrogenation, monometallic palladium catalysts give mainly 1-hexene at conversions lower than 80% and E-hex-2-ene at higher conversions. The fractional selectivity to 1-hexene is significantly improved by tin or silver addition; however, significant yields are observed only on Pd–Sn catalysts with a low Sn/Pd atomic ratio (≈0.1) and when the intermetallic compound Pd3Sn is present. On the other hand, in the hexa-1,3-diene hydrogenation, hex-1-ene is preferentially formed on monometallic catalysts with low dispersion; on bimetallic Pd–Sn or Pd–Ag catalysts, the selectivity to E-hex-3-ene is enhanced and this isomer is even predominant up to 100% conversion on the Pd–Sn catalysts containing the Pd3Sn intermetallic compound. These results are explained by the geometric effect of dilution of Pd atoms, which delays the palladium double-bond isomerization ability. The proposed mechanism suggests that strongly adsorbed alkadienes react with dissolved hydrogen, following a zero-order kinetics.Submitted by Texeira Ana (atanateixeira@gmail.com) on 2012-11-26T21:11:19Z No. of bitstreams: 1 Sales.pdf: 136985 bytes, checksum: 5961256d3f993fde7dbd5534e9c9440b (MD5)Made available in DSpace on 2012-11-26T21:11:19Z (GMT). No. of bitstreams: 1 Sales.pdf: 136985 bytes, checksum: 5961256d3f993fde7dbd5534e9c9440b (MD5) Previous issue date: 2000-10Elsevierhttp://dx.doi.org/10.1006/jcat.2000.2966reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAPd catalystsPd–Sn catalystsPd–Ag catalystsSelective hydrogenationHexa-1,5-dieneHexa-1,3-dieneLiquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. 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dc.title.pt_BR.fl_str_mv Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
dc.title.alternative.pt_BR.fl_str_mv Journal of Catalysis
title Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
spellingShingle Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
Sales, Emerson Andrade
Pd catalysts
Pd–Sn catalysts
Pd–Ag catalysts
Selective hydrogenation
Hexa-1,5-diene
Hexa-1,3-diene
title_short Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
title_full Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
title_fullStr Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
title_full_unstemmed Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
title_sort Liquid-Phase Selective Hydrogenation of Hexa-1,5-diene and Hexa-1,3-diene on Palladium Catalysts. Effect of Tin and Silver Addition
author Sales, Emerson Andrade
author_facet Sales, Emerson Andrade
Mendes, Mario de Jesus
Bozon Verduraz, François
author_role author
author2 Mendes, Mario de Jesus
Bozon Verduraz, François
author2_role author
author
dc.contributor.author.fl_str_mv Sales, Emerson Andrade
Mendes, Mario de Jesus
Bozon Verduraz, François
Sales, Emerson Andrade
Mendes, Mario de Jesus
Bozon Verduraz, François
dc.subject.por.fl_str_mv Pd catalysts
Pd–Sn catalysts
Pd–Ag catalysts
Selective hydrogenation
Hexa-1,5-diene
Hexa-1,3-diene
topic Pd catalysts
Pd–Sn catalysts
Pd–Ag catalysts
Selective hydrogenation
Hexa-1,5-diene
Hexa-1,3-diene
description p.96–105
publishDate 2000
dc.date.issued.fl_str_mv 2000-10
dc.date.accessioned.fl_str_mv 2012-11-26T21:11:19Z
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/7282
dc.identifier.issn.none.fl_str_mv 0021-9517
dc.identifier.number.pt_BR.fl_str_mv v. 195, n. 1
identifier_str_mv 0021-9517
v. 195, n. 1
url http://www.repositorio.ufba.br/ri/handle/ri/7282
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.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1006/jcat.2000.2966
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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