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Zhou S, Pan Y, Wang Y, Cheng H, Wu P, Li H, Huang Y, Hua M, Liu J, Zhu W. Modulating the Reaction Pathway of Ni 2P/Al 2O 3 by Introducing Different Noble Metals for Hydrodesulfurization of Diesel. Inorg Chem 2024; 63:16928-16939. [PMID: 39197118 DOI: 10.1021/acs.inorgchem.4c03181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2024]
Abstract
Regulating the reaction pathway of a hydrodesulfurization (HDS) catalyst to achieve ultradeep desulfurization of diesel is a low-energy-consumption yet effective strategy but remains a tricky challenge. Herein, we present a Ni2P/Al2O3 catalyst with mesoporous properties synthesized by a facile hydrothermal-temperature-programmed reduction and normal impregnation (TPRI) method, and then different precious metals with similar loadings were introduced to prepare M-Ni2P/Al2O3 (M = Pt, Pd) catalysts through incipient wetness impregnation. Their structures were analyzed by a series of characterization methods, and their catalytic performances were examined for 4,6-dimethyldibenzothiophene (4,6-DMDBT) HDS. The correlation characterization results revealed that the kind of precious metals significantly affected the surface acidity and then the metal-support interaction (MSI) between Ni2P and Al2O3. Among them, the Pt-Ni2P/Al2O3 catalyst exhibits superior HDS activity with 88.5% 4,6-DMDBT conversion to Pd-Ni2P/Al2O3 (76.3%) and pristine Ni2P/Al2O3 (58.6%) catalysts under reaction conditions of 3.4 MPa, 340 °C, and LHSV = 4.8 h-1. This should be due to the introduction of Pt, which significantly facilitates the dissociation rate of H2 and the subsequent generation of more active hydrogen species than Pd, thereby promoting the formation of Brønsted acid sites, remarkably facilitating the isomerization (ISO) pathway, and markedly enhancing the 4,6-DMDBT HDS conversion of Pt-Ni2P/Al2O3. This work provides an efficient protocol to tame the reaction pathway and thereafter the catalytic performance of the HDS catalyst in the future.
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Affiliation(s)
- Shuhui Zhou
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yu Pan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yan Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Huifang Cheng
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Peiwen Wu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Huaming Li
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yan Huang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Mingqing Hua
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Jixing Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Wenshuai Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P. R. China
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Liu F, Zhang Y, Luo Y, Zhai W, Lu Y, Liu J, Li M. Developing an Approach for Calculating Theoretical Minimum Hydrogen Consumption during Catalytic Hydrotreating of Diesel. Chempluschem 2024; 89:e202400009. [PMID: 38520673 DOI: 10.1002/cplu.202400009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/09/2024] [Accepted: 03/18/2024] [Indexed: 03/25/2024]
Abstract
Identifying the unnecessary H2 consumption existing in diesel hydrotreating process and calculating theoretical minimum H2 consumption are extremely critical for reducing H2 consumption in consideration of carbon reduction and resource utilization improvement. In this work, chemical reactions happened during diesel hydrotreating were categorized into hydrodesulfurization (HDS), hydrodenitrogenation (HDN), saturation of monocyclic aromatic hydrocarbons (MAHs), saturation of polycyclic aromatic hydrocarbons (PAHs), hydrogenation of olefins (HGO) and hydrocracking reactions (HCR). Then, in order to gain insights into where and how much H2 can be reduced, the ideal molecular compositions of the products were analyzed when theoretical minimum H2 was achieved for each type of reactions, which can give a genuine value of average relative molecular weight and average number of moles of H2 consumed per mole of reactants, leading to the establishment of method for calculating theoretical minimum H2 consumption. Additionally, the above method was used to calculate theoretical minimum H2 consumption of five diesel feedstocks with different properties to study the influence of content of S, N and PAHs in the feed on theoretical minimum H2 consumption. This method can provide guidance for experiments of H2 consumption reduction, and also help the refineries to save potential costs of H2.
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Affiliation(s)
- Feng Liu
- Department of Hydrogenation Catalyst, Sinopec Research Institute of Petroleum Processing, 18 Xueyuan Road, Beijing, P.R. China
| | - Yubai Zhang
- Department of Hydrogenation Catalyst, Sinopec Research Institute of Petroleum Processing, 18 Xueyuan Road, Beijing, P.R. China
| | - Yong Luo
- Department of chemical engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing, P.R. China
| | - Weiming Zhai
- Department of Hydrogenation Catalyst, Sinopec Research Institute of Petroleum Processing, 18 Xueyuan Road, Beijing, P.R. China
| | - Yutao Lu
- Department of Hydrogenation Catalyst, Sinopec Research Institute of Petroleum Processing, 18 Xueyuan Road, Beijing, P.R. China
| | - Jiaxu Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, NO.2, Linggong Road, Dalian, Liaoning Province, P.R. China
| | - Mingfeng Li
- Department of Hydrogenation Catalyst, Sinopec Research Institute of Petroleum Processing, 18 Xueyuan Road, Beijing, P.R. China
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Zhu J, Liu J, Zhu J, Lu S, Yan R, Cheng K, Cheng H, Liu H, Li H, Zhu W. 3D Printing Technique Fortifies the Ultradeep Hydrodesulfurization Process of Diesel: A Journey of NiMo/Al 2O 3-MMT. Inorg Chem 2023. [PMID: 37989485 DOI: 10.1021/acs.inorgchem.3c02839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
In this contribution, we rationally designed and controllably fabricated a NiMo/Al2O3-montmorillonite (3D-NiMo/Al2O3-MMT) monolithic catalyst via a 3D printing strategy with economical montmorillonite (MMT) as a binder. The catalytic performance of the resulting NiMo/Al2O3-MMT for 4,6-dimethyldibenzothiophene (4,6-DMDBT) hydrodesulfurization (HDS) was evaluated. The experimental results unveil that the 3D-NiMo/Al2O3-MMT monolithic catalyst exhibits robust stability and exceptional HDS activity with 99.2% 4,6-DMDBT conversion (residual 4 ppm of S), which is remarkably superior to that of conventional NiMo/Al2O3 (61.5%), NiMo/MMT (63.2%), and even NiMo/Al2O3-MMT (76.5%) prepared by the mechanical-mixing method. This should be ascribed to the synthetic effect between the MMT binder and the Al2O3 substrate, which effectively weakens the interaction between the Mo species and the Lewis acids on the original Al2O3 surface, thereby significantly increasing the content of reducible Mo species and considerably facilitating the formation of more highly active NiMoS phase (Type II) with optimal average stacking layers and thereafter remarkably enhancing the ultradeep HDS activity of the 3D-NiMo/Al2O3-MMT monolithic catalyst.
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Affiliation(s)
- Jingyi Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Jixing Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Jie Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Shichao Lu
- Beijing Aeronautical Technology Research Center, Beijing 100076, P.R. China
| | - Rixin Yan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Kai Cheng
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, P.R. China
| | - Huifang Cheng
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Hui Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Huaming Li
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Wenshuai Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
- College of Chemical Engineering and Environmental, China University of Petroleum, Beijing 102249, P.R. China
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