Cargando…
Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity
A unique organosiloxane-polyether amine (OPA) was produced and used as mesoporogen to efficiently synthesize hierarchical ZSM-5 zeolites with great mesoporosity. We have employed silica sol and tetraethylorthosilicate, respectively, to investigate the influence of different silicon sources on hierar...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6304151/ https://www.ncbi.nlm.nih.gov/pubmed/30662760 http://dx.doi.org/10.1098/rsos.181691 |
_version_ | 1783382298373128192 |
---|---|
author | Song, Guoqiang Chen, Wenting Dang, Peipei Wang, Yuanyi Li, Fuxiang |
author_facet | Song, Guoqiang Chen, Wenting Dang, Peipei Wang, Yuanyi Li, Fuxiang |
author_sort | Song, Guoqiang |
collection | PubMed |
description | A unique organosiloxane-polyether amine (OPA) was produced and used as mesoporogen to efficiently synthesize hierarchical ZSM-5 zeolites with great mesoporosity. We have employed silica sol and tetraethylorthosilicate, respectively, to investigate the influence of different silicon sources on hierarchical zeolites in the presence of OPA. The mesopores of synthesized samples focused on 6–15 nm, and the external surface area varied from 185 to 463 m(2) g(−1) where the micropore surface area was maintained at 245–334 m(2) g(−1). Benefiting from the superior structure properties, these samples were used as catalysts in the reaction of methanol to propylene, and the optimal one catalysed for 180 h with methanol conversion above 95%. The as-produced OPA could connect steadily with zeolite frameworks through covalent bonds (–Si–O–Si–) during the hydrothermal crystallization process. This type of connection mode could effectively avoid the formation of amorphous phase and the special molecular structure of OPA could efficiently introduce abundant mesopores with few micropores being consumed. The samples synthesized with silicon sol were made up of quasi-circular particles of about 800 nm in size and further consisted of nanocrystals of 40 nm, and the samples produced with TEOS have a particle size of about 1–2 µm aggregated with nanocrystals of 300 nm. |
format | Online Article Text |
id | pubmed-6304151 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-63041512019-01-18 Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity Song, Guoqiang Chen, Wenting Dang, Peipei Wang, Yuanyi Li, Fuxiang R Soc Open Sci Chemistry A unique organosiloxane-polyether amine (OPA) was produced and used as mesoporogen to efficiently synthesize hierarchical ZSM-5 zeolites with great mesoporosity. We have employed silica sol and tetraethylorthosilicate, respectively, to investigate the influence of different silicon sources on hierarchical zeolites in the presence of OPA. The mesopores of synthesized samples focused on 6–15 nm, and the external surface area varied from 185 to 463 m(2) g(−1) where the micropore surface area was maintained at 245–334 m(2) g(−1). Benefiting from the superior structure properties, these samples were used as catalysts in the reaction of methanol to propylene, and the optimal one catalysed for 180 h with methanol conversion above 95%. The as-produced OPA could connect steadily with zeolite frameworks through covalent bonds (–Si–O–Si–) during the hydrothermal crystallization process. This type of connection mode could effectively avoid the formation of amorphous phase and the special molecular structure of OPA could efficiently introduce abundant mesopores with few micropores being consumed. The samples synthesized with silicon sol were made up of quasi-circular particles of about 800 nm in size and further consisted of nanocrystals of 40 nm, and the samples produced with TEOS have a particle size of about 1–2 µm aggregated with nanocrystals of 300 nm. The Royal Society 2018-12-12 /pmc/articles/PMC6304151/ /pubmed/30662760 http://dx.doi.org/10.1098/rsos.181691 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 Song, Guoqiang Chen, Wenting Dang, Peipei Wang, Yuanyi Li, Fuxiang Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity |
title | Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity |
title_full | Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity |
title_fullStr | Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity |
title_full_unstemmed | Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity |
title_short | Synthesis of an excellent MTP catalyst: hierarchical ZSM-5 zeolites with great mesoporosity |
title_sort | synthesis of an excellent mtp catalyst: hierarchical zsm-5 zeolites with great mesoporosity |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6304151/ https://www.ncbi.nlm.nih.gov/pubmed/30662760 http://dx.doi.org/10.1098/rsos.181691 |
work_keys_str_mv | AT songguoqiang synthesisofanexcellentmtpcatalysthierarchicalzsm5zeoliteswithgreatmesoporosity AT chenwenting synthesisofanexcellentmtpcatalysthierarchicalzsm5zeoliteswithgreatmesoporosity AT dangpeipei synthesisofanexcellentmtpcatalysthierarchicalzsm5zeoliteswithgreatmesoporosity AT wangyuanyi synthesisofanexcellentmtpcatalysthierarchicalzsm5zeoliteswithgreatmesoporosity AT lifuxiang synthesisofanexcellentmtpcatalysthierarchicalzsm5zeoliteswithgreatmesoporosity |