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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MDPI AG
2021-10-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/11/1277 |
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| 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 |
| collection | DOAJ |
| 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. |
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| last_indexed | 2024-03-10T05:38:19Z |
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| spelling | doaj.art-6c47b499eea54390a2b2d59fb2d1b0332023-11-22T22:44:49ZengMDPI AGCatalysts2073-43442021-10-011111127710.3390/catal11111277Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) UpgradingJianglong Pu0Haiping Zhang1Min Wang2Kyle Rogers3Hongmei Wang4Hui Wang5Siauw Ng6Ping Sun7College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, ChinaDepartment of Chemical Engineering, University of New Brunswick, 15 Dineen Drive, Fredericton, NB E3B 5A3, CanadaSchool of Petroleum Engineering & Environment, Zhejiang Ocean University, 1 South Haida Road, Lincheng Changzhi Island, Zhoushan 316022, ChinaDepartment of Chemical Engineering, University of New Brunswick, 15 Dineen Drive, Fredericton, NB E3B 5A3, CanadaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, ChinaNational Centre for Upgrading Technology, Canmet ENERGY-Devon, 1 Oil Patch Drive, Edmonton, AB T9G 1A8, CanadaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, ChinaLight 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.https://www.mdpi.com/2073-4344/11/11/1277bimetallicalumina-zeolite supportlight cycle oilhydrodesulfurizationhydrodenitrogenationhydrodearomatization |
| spellingShingle | 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 Catalysts bimetallic alumina-zeolite support light cycle oil hydrodesulfurization hydrodenitrogenation hydrodearomatization |
| title | 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_short | 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 |
| topic | bimetallic alumina-zeolite support light cycle oil hydrodesulfurization hydrodenitrogenation hydrodearomatization |
| url | https://www.mdpi.com/2073-4344/11/11/1277 |
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