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Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst
Activated red brick (ARB) clay material proved superb catalyst for selective conversion of 1,5-pentanediol (1,5-PDO) to tetrahydropyran (THP) and 1,6-hexanediol (1,6-HDO) to oxepane (OP) via dehydration under vapor phase conditions in a continuous flow reactor. As per scanning electron microscopy (S...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6376155/ https://www.ncbi.nlm.nih.gov/pubmed/30809597 http://dx.doi.org/10.1016/j.heliyon.2019.e01212 |
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author | Madduluri, Venkata Rao Katari, Naresh Kumar Peddinti, Nagaiah Prathap, Challa Burri, David Raju Kamaraju, Seetha Rama Rao Jonnalagadda, Sreekantha B. |
author_facet | Madduluri, Venkata Rao Katari, Naresh Kumar Peddinti, Nagaiah Prathap, Challa Burri, David Raju Kamaraju, Seetha Rama Rao Jonnalagadda, Sreekantha B. |
author_sort | Madduluri, Venkata Rao |
collection | PubMed |
description | Activated red brick (ARB) clay material proved superb catalyst for selective conversion of 1,5-pentanediol (1,5-PDO) to tetrahydropyran (THP) and 1,6-hexanediol (1,6-HDO) to oxepane (OP) via dehydration under vapor phase conditions in a continuous flow reactor. As per scanning electron microscopy (SEM), SEM-EDX and X-ray fluorescence (XRF) techniques, ARB clay catalyst majorly possessed silica (quartz), and iron oxide (hematite) species, and synergistic texture contributed to the catalytic efficiency for prolonged time-on-stream (TOS). The combination of active Lewis and Bronsted acidic sites with weak to mild acidic nature in the ARB clay obviously facilitates the dehydration reaction with high selectivity, tetrahydropyran (82%) and oxepane (89%). ARB clay displayed superior catalytic properties in the dehydration of alcohols compared with activities of commercial silica and α-Fe(2)O(3) as catalysts. Commercial silica and α-Fe(2)O(3) catalysts possessing the Lewis acidic sites only did not facilitate synchronous dehydration mechanism. |
format | Online Article Text |
id | pubmed-6376155 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-63761552019-02-26 Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst Madduluri, Venkata Rao Katari, Naresh Kumar Peddinti, Nagaiah Prathap, Challa Burri, David Raju Kamaraju, Seetha Rama Rao Jonnalagadda, Sreekantha B. Heliyon Article Activated red brick (ARB) clay material proved superb catalyst for selective conversion of 1,5-pentanediol (1,5-PDO) to tetrahydropyran (THP) and 1,6-hexanediol (1,6-HDO) to oxepane (OP) via dehydration under vapor phase conditions in a continuous flow reactor. As per scanning electron microscopy (SEM), SEM-EDX and X-ray fluorescence (XRF) techniques, ARB clay catalyst majorly possessed silica (quartz), and iron oxide (hematite) species, and synergistic texture contributed to the catalytic efficiency for prolonged time-on-stream (TOS). The combination of active Lewis and Bronsted acidic sites with weak to mild acidic nature in the ARB clay obviously facilitates the dehydration reaction with high selectivity, tetrahydropyran (82%) and oxepane (89%). ARB clay displayed superior catalytic properties in the dehydration of alcohols compared with activities of commercial silica and α-Fe(2)O(3) as catalysts. Commercial silica and α-Fe(2)O(3) catalysts possessing the Lewis acidic sites only did not facilitate synchronous dehydration mechanism. Elsevier 2019-02-13 /pmc/articles/PMC6376155/ /pubmed/30809597 http://dx.doi.org/10.1016/j.heliyon.2019.e01212 Text en © 2019 Published by Elsevier Ltd. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Madduluri, Venkata Rao Katari, Naresh Kumar Peddinti, Nagaiah Prathap, Challa Burri, David Raju Kamaraju, Seetha Rama Rao Jonnalagadda, Sreekantha B. Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst |
title | Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst |
title_full | Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst |
title_fullStr | Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst |
title_full_unstemmed | Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst |
title_short | Unique Lewis and Bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst |
title_sort | unique lewis and bronsted acidic sites texture in the selective production of tetrahydropyran and oxepanefrom1,5-pentanediol and 1,6-hexanediol over sustainable red brick clay catalyst |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6376155/ https://www.ncbi.nlm.nih.gov/pubmed/30809597 http://dx.doi.org/10.1016/j.heliyon.2019.e01212 |
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