Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking

Abstract Layered zeolites and their delaminated structures are novel materials that enhance the catalytic performance of catalysts by addressing diffusion limitations of the reactant molecules. n-Hexane catalytic cracking was observed over MCM-22 layered zeolite and its derivative structures over th...

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Autores principales:	Ali Ahmad, Salman Raza Naqvi, Muhammad Rafique, Habib Nasir, Ali Sarosh
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/472e278652fa49fa9f184f16cf2711d9
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spelling	oai:doaj.org-article:472e278652fa49fa9f184f16cf2711d92021-12-02T11:43:36ZSynthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking10.1038/s41598-020-78746-92045-2322https://doaj.org/article/472e278652fa49fa9f184f16cf2711d92020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78746-9https://doaj.org/toc/2045-2322Abstract Layered zeolites and their delaminated structures are novel materials that enhance the catalytic performance of catalysts by addressing diffusion limitations of the reactant molecules. n-Hexane catalytic cracking was observed over MCM-22 layered zeolite and its derivative structures over the temperature range of 450–650 °C for the production of olefins. MCM-22, H-MCM-22, and ITQ-2 zeolites were prepared by the hydrothermal method. Oxalic acid was used as a dealuminating reagent to obtain H-MCM-22 with various Si/Al ratios ranging from 09–65. The prepared samples were characterized by XRD, SEM, TGA, and BET. The cracking of n-hexane was carried out by Pyro/GC–MS. It was observed that the selectivity for olefins was improved by increasing the Si/Al ratio. H-MCM-22–10% produced the highest relative olefinic concentration of 68% as compared to other dealuminated structures. Moreover, the product distribution showed that higher reaction temperature is favorable to produce more olefins. Furthermore, a comparison between ITQ-2 and MCM-22 derived structures showed that ITQ-2 is more favorable for olefins production at high temperatures. The concentration of relative olefins was increased up to 80% over ITQ-2 at 650 °C.Ali AhmadSalman Raza NaqviMuhammad RafiqueHabib NasirAli SaroshNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ali Ahmad Salman Raza Naqvi Muhammad Rafique Habib Nasir Ali Sarosh Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking
description	Abstract Layered zeolites and their delaminated structures are novel materials that enhance the catalytic performance of catalysts by addressing diffusion limitations of the reactant molecules. n-Hexane catalytic cracking was observed over MCM-22 layered zeolite and its derivative structures over the temperature range of 450–650 °C for the production of olefins. MCM-22, H-MCM-22, and ITQ-2 zeolites were prepared by the hydrothermal method. Oxalic acid was used as a dealuminating reagent to obtain H-MCM-22 with various Si/Al ratios ranging from 09–65. The prepared samples were characterized by XRD, SEM, TGA, and BET. The cracking of n-hexane was carried out by Pyro/GC–MS. It was observed that the selectivity for olefins was improved by increasing the Si/Al ratio. H-MCM-22–10% produced the highest relative olefinic concentration of 68% as compared to other dealuminated structures. Moreover, the product distribution showed that higher reaction temperature is favorable to produce more olefins. Furthermore, a comparison between ITQ-2 and MCM-22 derived structures showed that ITQ-2 is more favorable for olefins production at high temperatures. The concentration of relative olefins was increased up to 80% over ITQ-2 at 650 °C.
format	article
author	Ali Ahmad Salman Raza Naqvi Muhammad Rafique Habib Nasir Ali Sarosh
author_facet	Ali Ahmad Salman Raza Naqvi Muhammad Rafique Habib Nasir Ali Sarosh
author_sort	Ali Ahmad
title	Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking
title_short	Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking
title_full	Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking
title_fullStr	Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking
title_full_unstemmed	Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking
title_sort	synthesis, characterization and catalytic testing of mcm-22 derived catalysts for n-hexane cracking
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/472e278652fa49fa9f184f16cf2711d9
work_keys_str_mv	AT aliahmad synthesischaracterizationandcatalytictestingofmcm22derivedcatalystsfornhexanecracking AT salmanrazanaqvi synthesischaracterizationandcatalytictestingofmcm22derivedcatalystsfornhexanecracking AT muhammadrafique synthesischaracterizationandcatalytictestingofmcm22derivedcatalystsfornhexanecracking AT habibnasir synthesischaracterizationandcatalytictestingofmcm22derivedcatalystsfornhexanecracking AT alisarosh synthesischaracterizationandcatalytictestingofmcm22derivedcatalystsfornhexanecracking
_version_	1718395337730686976

Synthesis, characterization and catalytic testing of MCM-22 derived catalysts for n-hexane cracking

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