Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading

Light cycle oil (LCO) is one of the major products in Fluid catalytic cracking (FCC) processes, and has drawbacks such as high aromatics, sulfur, and nitrogen contents, and low cetane number (CN). Hydro-upgrading is one of the most typical processes for LCO upgrading, and alumina-zeolite (AZ) is an...

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Autores principales:	Jianglong Pu, Haiping Zhang, Min Wang, Kyle Rogers, Hongmei Wang, Hui Wang, Siauw Ng, Ping Sun
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bimetallic alumina-zeolite support light cycle oil hydrodesulfurization hydrodenitrogenation hydrodearomatization Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/6c47b499eea54390a2b2d59fb2d1b033
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spelling	oai:doaj.org-article:6c47b499eea54390a2b2d59fb2d1b0332021-11-25T17:05:22ZRoles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading10.3390/catal111112772073-4344https://doaj.org/article/6c47b499eea54390a2b2d59fb2d1b0332021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1277https://doaj.org/toc/2073-4344Light cycle oil (LCO) is one of the major products in Fluid catalytic cracking (FCC) processes, and has drawbacks such as high aromatics, sulfur, and nitrogen contents, and low cetane number (CN). Hydro-upgrading is one of the most typical processes for LCO upgrading, and alumina-zeolite (AZ) is an effective hydrotreating catalyst support. This paper examined the effects of different bimetallic catalysts (CoMo/AZ, NiMo/AZ, and NiW/AZ) supported by AZ on hydro-upgrading of both model compounds and real LCO. CoMo/AZ preferred the direct desulfurization (DDS) route while the NiMo/AZ and NiW/AZ catalysts favored the desulfurization route through hydrogenation (HYD). The presence of nitrogen compounds in the feed introduced a competitive adsorption mechanism and reduced the number of available acid sites. Aromatics were partially hydrogenated into methyltetralines at first, and then further hydrogenated, cracked, and isomerized into methyldecalins, monocyclic, and methyltetralines isomers. CoMo/AZ is the best hydrodesulfurization (HDS) catalyst for the model compounds at low H<sub>2</sub> pressure (550 psi) and for LCO at lower temperature (573 K), while NiMo/AZ performs the best for LCO at higher temperature (648 K). NiMo/AZ is the best hydrodenitrogenation (HDN) catalyst for LCO. The hydrodearomatization (HDA) performances of NiMo/AZ and NiW/AZ improved significantly and overwhelmingly higher than that of the CoMo/AZ when the H<sub>2</sub> pressure was increased to 1100 psi.Jianglong PuHaiping ZhangMin WangKyle RogersHongmei WangHui WangSiauw NgPing SunMDPI AGarticlebimetallicalumina-zeolite supportlight cycle oilhydrodesulfurizationhydrodenitrogenationhydrodearomatizationChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1277, p 1277 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bimetallic alumina-zeolite support light cycle oil hydrodesulfurization hydrodenitrogenation hydrodearomatization Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	bimetallic alumina-zeolite support light cycle oil hydrodesulfurization hydrodenitrogenation hydrodearomatization Chemical technology TP1-1185 Chemistry QD1-999 Jianglong Pu Haiping Zhang Min Wang Kyle Rogers Hongmei Wang Hui Wang Siauw Ng Ping Sun Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading
description	Light cycle oil (LCO) is one of the major products in Fluid catalytic cracking (FCC) processes, and has drawbacks such as high aromatics, sulfur, and nitrogen contents, and low cetane number (CN). Hydro-upgrading is one of the most typical processes for LCO upgrading, and alumina-zeolite (AZ) is an effective hydrotreating catalyst support. This paper examined the effects of different bimetallic catalysts (CoMo/AZ, NiMo/AZ, and NiW/AZ) supported by AZ on hydro-upgrading of both model compounds and real LCO. CoMo/AZ preferred the direct desulfurization (DDS) route while the NiMo/AZ and NiW/AZ catalysts favored the desulfurization route through hydrogenation (HYD). The presence of nitrogen compounds in the feed introduced a competitive adsorption mechanism and reduced the number of available acid sites. Aromatics were partially hydrogenated into methyltetralines at first, and then further hydrogenated, cracked, and isomerized into methyldecalins, monocyclic, and methyltetralines isomers. CoMo/AZ is the best hydrodesulfurization (HDS) catalyst for the model compounds at low H<sub>2</sub> pressure (550 psi) and for LCO at lower temperature (573 K), while NiMo/AZ performs the best for LCO at higher temperature (648 K). NiMo/AZ is the best hydrodenitrogenation (HDN) catalyst for LCO. The hydrodearomatization (HDA) performances of NiMo/AZ and NiW/AZ improved significantly and overwhelmingly higher than that of the CoMo/AZ when the H<sub>2</sub> pressure was increased to 1100 psi.
format	article
author	Jianglong Pu Haiping Zhang Min Wang Kyle Rogers Hongmei Wang Hui Wang Siauw Ng Ping Sun
author_facet	Jianglong Pu Haiping Zhang Min Wang Kyle Rogers Hongmei Wang Hui Wang Siauw Ng Ping Sun
author_sort	Jianglong Pu
title	Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading
title_short	Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading
title_full	Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading
title_fullStr	Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading
title_full_unstemmed	Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading
title_sort	roles of nanostructured bimetallic supported on alumina-zeolite (az) in light cycle oil (lco) upgrading
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6c47b499eea54390a2b2d59fb2d1b033
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Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading

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