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Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion
We present and develop alternative catalysts for biomass conversion and specifically lignin conversion into aromatics. Unlike the conventional CoMo and NiMo formulations, our catalysts can convert low-sulfur feedstocks. A set of five magnesia–alumina mixed oxides were screened in the hydrodealkylati...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
WILEY-VCH Verlag
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3262969/ http://dx.doi.org/10.1002/ejoc.201101015 |
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author | Strassberger, Zea Tanase, Stefania Rothenberg, Gadi |
author_facet | Strassberger, Zea Tanase, Stefania Rothenberg, Gadi |
author_sort | Strassberger, Zea |
collection | PubMed |
description | We present and develop alternative catalysts for biomass conversion and specifically lignin conversion into aromatics. Unlike the conventional CoMo and NiMo formulations, our catalysts can convert low-sulfur feedstocks. A set of five magnesia–alumina mixed oxides were screened in the hydrodealkylation of alkyl phenyl ethers as lignin model compounds. The typical selectivity to phenol is 30–75 %. Interestingly, we saw that the more basic the catalyst, the higher the selectivity for phenol. The results concur with the formation of phenoxide (PhO(–)) and RH(3)(+) fragments on the catalyst surface. These can then react with H(+) and H(–) species formed by the hydrogen dissociation on the MgO surface, giving phenol and hydrocarbons. We conclude that magnesia–alumina mixed oxides are attractive candidates for catalyzing lignin breakdown. These catalysts are highly stable, inexpensive, and readily available. |
format | Online Article Text |
id | pubmed-3262969 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | WILEY-VCH Verlag |
record_format | MEDLINE/PubMed |
spelling | pubmed-32629692012-01-22 Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion Strassberger, Zea Tanase, Stefania Rothenberg, Gadi European J Org Chem Short Communication We present and develop alternative catalysts for biomass conversion and specifically lignin conversion into aromatics. Unlike the conventional CoMo and NiMo formulations, our catalysts can convert low-sulfur feedstocks. A set of five magnesia–alumina mixed oxides were screened in the hydrodealkylation of alkyl phenyl ethers as lignin model compounds. The typical selectivity to phenol is 30–75 %. Interestingly, we saw that the more basic the catalyst, the higher the selectivity for phenol. The results concur with the formation of phenoxide (PhO(–)) and RH(3)(+) fragments on the catalyst surface. These can then react with H(+) and H(–) species formed by the hydrogen dissociation on the MgO surface, giving phenol and hydrocarbons. We conclude that magnesia–alumina mixed oxides are attractive candidates for catalyzing lignin breakdown. These catalysts are highly stable, inexpensive, and readily available. WILEY-VCH Verlag 2011-09 2011-08-11 /pmc/articles/PMC3262969/ http://dx.doi.org/10.1002/ejoc.201101015 Text en Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. |
spellingShingle | Short Communication Strassberger, Zea Tanase, Stefania Rothenberg, Gadi Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion |
title | Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion |
title_full | Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion |
title_fullStr | Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion |
title_full_unstemmed | Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion |
title_short | Reductive Dealkylation of Anisole and Phenetole: Towards Practical Lignin Conversion |
title_sort | reductive dealkylation of anisole and phenetole: towards practical lignin conversion |
topic | Short Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3262969/ http://dx.doi.org/10.1002/ejoc.201101015 |
work_keys_str_mv | AT strassbergerzea reductivedealkylationofanisoleandphenetoletowardspracticalligninconversion AT tanasestefania reductivedealkylationofanisoleandphenetoletowardspracticalligninconversion AT rothenberggadi reductivedealkylationofanisoleandphenetoletowardspracticalligninconversion |