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Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production
p-Xylene is a commodity chemical used for the manufacture of plastic bottles and textiles. For the biomass-based route from 2,5-dimethylfuran (DMF) and ethylene, the properties of the catalyst such as acidity effect, product selectivity and catalyst activity play an important role. To determine the...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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The Royal Society Publishing
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5990767/ https://www.ncbi.nlm.nih.gov/pubmed/29892435 http://dx.doi.org/10.1098/rsos.172471 |
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author | Mahmoud, Eyas |
author_facet | Mahmoud, Eyas |
author_sort | Mahmoud, Eyas |
collection | PubMed |
description | p-Xylene is a commodity chemical used for the manufacture of plastic bottles and textiles. For the biomass-based route from 2,5-dimethylfuran (DMF) and ethylene, the properties of the catalyst such as acidity effect, product selectivity and catalyst activity play an important role. To determine the effect of acidity and extraframework position in faujasite zeolite on p-xylene selectivity, type Y (Si/Al = 40 and Si/Al = 2.55) and X (Si/Al = 1.25) zeolites containing the extraframework Lewis acids Na+, K+, Li+, Ag+ and Cu+, and a Brønsted acid-containing zeolite, HY (Si/Al = 40), were prepared and tested for p-xylene production under solvent-free conditions and at low conversions (less than 35%). Here it is reported that NaX zeolite catalyses DMF and ethylene conversion to p-xylene with 91% selectivity at 30% conversion, which is better than the 25% p-xylene selectivity obtained when using HY at similar conversion. ANOVA was used to show that there is a synergistic effect between acidity and extraframework position on the rate of p-xylene production. At 7% DMF conversion, Lewis acids were more selective than the Brønsted acid tested (50 versus 30% p-xylene selectivity). p-Xylene selectivity is optimal when using Lewis acids with moderate acidity and extraframework positions located in the faujasite supercage (sites II and III). |
format | Online Article Text |
id | pubmed-5990767 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-59907672018-06-11 Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production Mahmoud, Eyas R Soc Open Sci Chemistry p-Xylene is a commodity chemical used for the manufacture of plastic bottles and textiles. For the biomass-based route from 2,5-dimethylfuran (DMF) and ethylene, the properties of the catalyst such as acidity effect, product selectivity and catalyst activity play an important role. To determine the effect of acidity and extraframework position in faujasite zeolite on p-xylene selectivity, type Y (Si/Al = 40 and Si/Al = 2.55) and X (Si/Al = 1.25) zeolites containing the extraframework Lewis acids Na+, K+, Li+, Ag+ and Cu+, and a Brønsted acid-containing zeolite, HY (Si/Al = 40), were prepared and tested for p-xylene production under solvent-free conditions and at low conversions (less than 35%). Here it is reported that NaX zeolite catalyses DMF and ethylene conversion to p-xylene with 91% selectivity at 30% conversion, which is better than the 25% p-xylene selectivity obtained when using HY at similar conversion. ANOVA was used to show that there is a synergistic effect between acidity and extraframework position on the rate of p-xylene production. At 7% DMF conversion, Lewis acids were more selective than the Brønsted acid tested (50 versus 30% p-xylene selectivity). p-Xylene selectivity is optimal when using Lewis acids with moderate acidity and extraframework positions located in the faujasite supercage (sites II and III). The Royal Society Publishing 2018-05-23 /pmc/articles/PMC5990767/ /pubmed/29892435 http://dx.doi.org/10.1098/rsos.172471 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Chemistry Mahmoud, Eyas Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production |
title | Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production |
title_full | Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production |
title_fullStr | Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production |
title_full_unstemmed | Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production |
title_short | Synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production |
title_sort | synergistic effect of acidity and extraframework position in faujasite on renewable p-xylene production |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5990767/ https://www.ncbi.nlm.nih.gov/pubmed/29892435 http://dx.doi.org/10.1098/rsos.172471 |
work_keys_str_mv | AT mahmoudeyas synergisticeffectofacidityandextraframeworkpositioninfaujasiteonrenewablepxyleneproduction |