Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite

Detalhes bibliográficos
Autor(a) principal: Fernandes, C.
Data de Publicação: 2007
Outros Autores: Catrinescu, C., Castilho, P., Russo, P. A., Carrott, M. R., Breen, C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.13/3266
Resumo: A series of acid-activated clay catalysts were prepared from a purified bentonite, rich in structural iron, collected at Serra de Dentro on the island of Porto Santo. The purified bentonite exhibited a surface area of 130 m2 g 1 which increased to values as high as 500 m2 g 1 following activation with 4M HCl at 95 8C for 30 min (SD-4M-95-30). The ability of the activated samples to convert limonene to p-cymene was evaluated using a reaction time of 15 min at 80 8C. The sample prepared using 3M HCl at 95 8C for 30 min (SD-3M-95-30) offered the optimum combination of surface area (470 m2 g 1 ) and acidity (0.26 mmol g 1 ) and 95% of the limonene was converted to product. About 15% of the product mixture was p-cymene whilst non-volatile products and polymeric species made up 54% of the product mixture. The presence of iron in the octahedral sheet of the SD bentonite appears responsible for the dehydrogenation activity. TG–MS analysis of acid activated samples, saturated with cyclohexylamine, reflected the dehydrogenation capabilities of the catalysts in that SD-3M-95-30 produced the most benzene and aniline as decomposition/ transformation products.
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spelling Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentoniteAcid activated claysAcidityCatalysisLimonenep-Cymene.Faculdade de Ciências Exatas e da EngenhariaA series of acid-activated clay catalysts were prepared from a purified bentonite, rich in structural iron, collected at Serra de Dentro on the island of Porto Santo. The purified bentonite exhibited a surface area of 130 m2 g 1 which increased to values as high as 500 m2 g 1 following activation with 4M HCl at 95 8C for 30 min (SD-4M-95-30). The ability of the activated samples to convert limonene to p-cymene was evaluated using a reaction time of 15 min at 80 8C. The sample prepared using 3M HCl at 95 8C for 30 min (SD-3M-95-30) offered the optimum combination of surface area (470 m2 g 1 ) and acidity (0.26 mmol g 1 ) and 95% of the limonene was converted to product. About 15% of the product mixture was p-cymene whilst non-volatile products and polymeric species made up 54% of the product mixture. The presence of iron in the octahedral sheet of the SD bentonite appears responsible for the dehydrogenation activity. TG–MS analysis of acid activated samples, saturated with cyclohexylamine, reflected the dehydrogenation capabilities of the catalysts in that SD-3M-95-30 produced the most benzene and aniline as decomposition/ transformation products.ElsevierDigitUMaFernandes, C.Catrinescu, C.Castilho, P.Russo, P. A.Carrott, M. R.Breen, C.2021-04-09T10:25:03Z20072007-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/3266engFernandes, C., Catrinescu, C., Castilho, P., Russo, P. A., Carrott, M. R., & Breen, C. (2007). Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite. Applied Catalysis A: General, 318, 108-120.10.1016/j.apcata.2006.10.048info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-19T05:34:12Zoai:digituma.uma.pt:10400.13/3266Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:06:15.304349Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
title Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
spellingShingle Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
Fernandes, C.
Acid activated clays
Acidity
Catalysis
Limonene
p-Cymene
.
Faculdade de Ciências Exatas e da Engenharia
title_short Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
title_full Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
title_fullStr Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
title_full_unstemmed Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
title_sort Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite
author Fernandes, C.
author_facet Fernandes, C.
Catrinescu, C.
Castilho, P.
Russo, P. A.
Carrott, M. R.
Breen, C.
author_role author
author2 Catrinescu, C.
Castilho, P.
Russo, P. A.
Carrott, M. R.
Breen, C.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv DigitUMa
dc.contributor.author.fl_str_mv Fernandes, C.
Catrinescu, C.
Castilho, P.
Russo, P. A.
Carrott, M. R.
Breen, C.
dc.subject.por.fl_str_mv Acid activated clays
Acidity
Catalysis
Limonene
p-Cymene
.
Faculdade de Ciências Exatas e da Engenharia
topic Acid activated clays
Acidity
Catalysis
Limonene
p-Cymene
.
Faculdade de Ciências Exatas e da Engenharia
description A series of acid-activated clay catalysts were prepared from a purified bentonite, rich in structural iron, collected at Serra de Dentro on the island of Porto Santo. The purified bentonite exhibited a surface area of 130 m2 g 1 which increased to values as high as 500 m2 g 1 following activation with 4M HCl at 95 8C for 30 min (SD-4M-95-30). The ability of the activated samples to convert limonene to p-cymene was evaluated using a reaction time of 15 min at 80 8C. The sample prepared using 3M HCl at 95 8C for 30 min (SD-3M-95-30) offered the optimum combination of surface area (470 m2 g 1 ) and acidity (0.26 mmol g 1 ) and 95% of the limonene was converted to product. About 15% of the product mixture was p-cymene whilst non-volatile products and polymeric species made up 54% of the product mixture. The presence of iron in the octahedral sheet of the SD bentonite appears responsible for the dehydrogenation activity. TG–MS analysis of acid activated samples, saturated with cyclohexylamine, reflected the dehydrogenation capabilities of the catalysts in that SD-3M-95-30 produced the most benzene and aniline as decomposition/ transformation products.
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-01-01T00:00:00Z
2021-04-09T10:25:03Z
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://hdl.handle.net/10400.13/3266
url http://hdl.handle.net/10400.13/3266
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Fernandes, C., Catrinescu, C., Castilho, P., Russo, P. A., Carrott, M. R., & Breen, C. (2007). Catalytic conversion of limonene over acid activated Serra de Dentro (SD) bentonite. Applied Catalysis A: General, 318, 108-120.
10.1016/j.apcata.2006.10.048
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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