Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction

The dispersion of supported Pt and Pt–Ir reforming catalysts have been studied, after treatment with oxidative and reducing atmosphere. Methylcyclohexane dehydrogenation reaction in the absence of hydrogen was used as a test reaction. An attempt was made to relate the behavior of the catalysts upon...

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Autores principales:	Ahmed J. Ali, Ameel Mohammed Rahman
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2009
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/ecd8a5740cfb497e941c1c7a9820c651
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spelling	oai:doaj.org-article:ecd8a5740cfb497e941c1c7a9820c6512021-12-02T05:35:30ZCharacterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction1818-11712312-0789https://doaj.org/article/ecd8a5740cfb497e941c1c7a9820c6512009-09-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/574https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789The dispersion of supported Pt and Pt–Ir reforming catalysts have been studied, after treatment with oxidative and reducing atmosphere. Methylcyclohexane dehydrogenation reaction in the absence of hydrogen was used as a test reaction. An attempt was made to relate the behavior of the catalysts upon subject to reaction, to the dispersion of the same type of catalysts upon treatment with similar atmosphere and temperatures which appeared in literature. The total conversion of reaction can be explained by a change in metal dispersion. Thus, methylcyclohexane dehydrogenation reaction appears to be a really “structure sensitive” reaction. The toluene yield increases as the oxidation temperature increases over the studied catalyst RG-402, RG-412, RG-422 and RG-432 respectively and reached a maximum value at 550°C. Above 550 the conversion decreases due to the effect of catalyst sintering. No significant change were observed for reduction temperature range 400-600°C for the above studied catalysts. The selectivity order for the studied catalysts and for reduction treatment experiments arranged as follows: RG-422> RG-432> RG-412> RG-402 Ahmed J. AliAmeel Mohammed RahmanAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 5, Iss 3 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Ahmed J. Ali Ameel Mohammed Rahman Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction
description	The dispersion of supported Pt and Pt–Ir reforming catalysts have been studied, after treatment with oxidative and reducing atmosphere. Methylcyclohexane dehydrogenation reaction in the absence of hydrogen was used as a test reaction. An attempt was made to relate the behavior of the catalysts upon subject to reaction, to the dispersion of the same type of catalysts upon treatment with similar atmosphere and temperatures which appeared in literature. The total conversion of reaction can be explained by a change in metal dispersion. Thus, methylcyclohexane dehydrogenation reaction appears to be a really “structure sensitive” reaction. The toluene yield increases as the oxidation temperature increases over the studied catalyst RG-402, RG-412, RG-422 and RG-432 respectively and reached a maximum value at 550°C. Above 550 the conversion decreases due to the effect of catalyst sintering. No significant change were observed for reduction temperature range 400-600°C for the above studied catalysts. The selectivity order for the studied catalysts and for reduction treatment experiments arranged as follows: RG-422> RG-432> RG-412> RG-402
format	article
author	Ahmed J. Ali Ameel Mohammed Rahman
author_facet	Ahmed J. Ali Ameel Mohammed Rahman
author_sort	Ahmed J. Ali
title	Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction
title_short	Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction
title_full	Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction
title_fullStr	Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction
title_full_unstemmed	Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction
title_sort	characterization of metal dispersion of some naphtha reforming catalysts by methylcyclohexane dehydrogenation reaction
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2009
url	https://doaj.org/article/ecd8a5740cfb497e941c1c7a9820c651
work_keys_str_mv	AT ahmedjali characterizationofmetaldispersionofsomenaphthareformingcatalystsbymethylcyclohexanedehydrogenationreaction AT ameelmohammedrahman characterizationofmetaldispersionofsomenaphthareformingcatalystsbymethylcyclohexanedehydrogenationreaction
_version_	1718400386583232512

Characterization of Metal Dispersion of Some Naphtha Reforming Catalysts by Methylcyclohexane Dehydrogenation Reaction

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