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Oliviero L, Maugé F, Afanasiev P, Pedraza-Parra C, Geantet C. Organic additives for hydrotreating catalysts: A review of main families and action mechanisms. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.09.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Effect of the cerium modification on acid–base properties of Mg–Al hydrotalcite-derived oxide system and catalytic performance in ethanol conversion. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-020-01907-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Garcia de Castro R, Bertrand J, Rigaud B, Devers E, Digne M, Lamic-Humblot AF, Pirngruber G, Carrier X. Surface-Dependent Activation of Model α-Al 2 O 3 -Supported P-Doped Hydrotreating Catalysts Prepared by Spin Coating. Chemistry 2020; 26:14623-14638. [PMID: 32579726 DOI: 10.1002/chem.202001882] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Indexed: 11/08/2022]
Abstract
Requirements for improved catalytic formulations is continuously driving research in hydrotreating (HDT) catalysis for biomass upgrading and heteroatom removal for cleaner fuels. The present work proposes a surface-science approach for the understanding of the genesis of the active (sulfide) phase in model P-doped MoS2 hydrotreating catalysts supported on α-Al2 O3 single crystals. This approach allows one to obtain a surface-dependent insight by varying the crystal orientations of the support. Model phosphorus-doped catalysts are prepared via spin-coating of Mo-P precursor solutions onto four α-Al2 O3 crystal orientations, C(0001), A(11 2 ‾ 0), M(10 1 ‾ 0) and R(1 1 ‾ 02) that exhibit different speciations of surface -OH. 31 P and 95 Mo liquid-state NMR are used to give a comprehensive description of the Mo and P speciation of the phospho-molybdic precursor solution. The speciation of the deposition solution is then correlated with the genesis of the active MoS2 phase. XPS quantification of the surface P/Mo ratio reveal a surface-dependent phosphate aggregation driven by the amount of free phosphates in solution. Phosphates aggregation decreases in the following order C(0001)≫M(10 1 ‾ 0)>A(11 2 ‾ 0), R(1 1 ‾ 02). This evolution can be rationalized by an increasing strength of phosphate/surface interactions on the different α-Al2 O3 surface orientations from the C(0001) to the R(1 1 ‾ 02) plane. Retardation of the sulfidation with temperature is observed for model catalysts with the highest phosphate dispersion on the surface (A(11 2 ‾ 0), R(1 1 ‾ 02)), suggesting that phosphorus strongly intervene in the genesis of the active phase through a close intimacy between phosphates and molybdates. The surface P/Mo ratio appears as a key descriptor to quantify this retarding effect. It is proposed that retardation of sulfidation is driven by two effects: i) a chemical inhibition through formation of hardly reducible mixed molybdo-phosphate structures and ii) a physical inhibition with phosphate clusters inhibiting the growth of MoS2 . The surface-dependent phosphorus doping on model α-Al2 O3 supports can be used as a guide for the rational design of more efficient HDT catalysts on industrial γ-Al2 O3 carrier.
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Affiliation(s)
- Ricardo Garcia de Castro
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, UMR CNRS 7197, 75005, Paris, France.,Direction of Catalysis, Biocatalysis and Separation, IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, 69360, Solaize, France
| | - Jérémy Bertrand
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, UMR CNRS 7197, 75005, Paris, France
| | - Baptiste Rigaud
- Sorbonne Université, CNRS, Institut des Matériaux de Paris-Centre, FR CNRS 2482 7197, 75005, Paris, France
| | - Elodie Devers
- Direction of Catalysis, Biocatalysis and Separation, IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, 69360, Solaize, France
| | - Mathieu Digne
- Direction of Catalysis, Biocatalysis and Separation, IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, 69360, Solaize, France
| | | | - Gerhard Pirngruber
- Direction of Catalysis, Biocatalysis and Separation, IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, 69360, Solaize, France
| | - Xavier Carrier
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, UMR CNRS 7197, 75005, Paris, France
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Oh Y, Noh H, Park H, Han H, Nguyen TB, Lee JK. Molecular-size selective hydroconversion of FCC light cycle oil into petrochemical light aromatic hydrocarbons. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.08.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Budukva S, Klimov O, Uvarkina D, Chesalov Y, Prosvirin I, Larina T, Noskov A. Effect of citric acid and triethylene glycol addition on the reactivation of CoMo/γ-Al2O3 hydrotreating catalysts. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.10.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dibenzothiophene Hydrodesulfurization over P-CoMo on Sol-Gel Alumina Modified by La Addition. Effect of Rare-Earth Content. Catalysts 2019. [DOI: 10.3390/catal9040359] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Alumina-lanthana (La at 1, 3, or 5 wt%) supports were prepared by sol-gel from Al alkoxide sol where La(NO3)3 was added. Annealed (550 °C) xerogels were characterized by N2 physisorption, thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy- energy dispersive spectroscopy (SEM-EDS), CO2-adsorption studied in IR region, Raman and ultraviolet-vis (UV-vis) spectroscopies. The texture of amorphous binary matrices of high La dispersion was adequate to applications in catalysts for middle distillates hydrodesulfurization (HDS). Generally, the amount and strength of surface basic sites increased with La content in solids. Mo (at 2.8 at. nm−2) and Co (at Co/(Co+Mo) = 0.3) were deposited over carriers by one-pot simultaneous impregnation in the presence of PO43− (P2O5/(NiO+MoO3) = 0.2 mass ratio). Calcined (400 °C) Co-Mo-P impregnated precursors had decreased basicity as to that of corresponding carriers, suggesting strong La-deposited species interaction. As La content in carriers increased Mo=O Raman stretching vibrations shifted to lower wave-numbers (949 to 935 cm−1) suggesting octahedral molybdates coordination change to tetrahedral. Although La at the lowest concentration (1 wt%) enhanced dibenzothiophene, HDS (~38% higher as to the Al2O3-supported formulation) desulfurization was significantly diminished at augmented content. Presence of hardly sulfidable tetrahedral Mo originated during impregnation at basic conditions in pores of La-modified carriers seemed to dictate observed behavior. Rare earth content in formulations enhanced selectivity to biphenyl.
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Rocha FS, Gomes AJ, Lunardi CN, Kaliaguine S, Patience GS. Experimental methods in chemical engineering: Ultraviolet visible spectroscopy-UV-Vis. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23344] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Fellipy S. Rocha
- Nanoscience and Nanobiotechnology Program; University of Brasília; Brasília Brazil
- Laboratory of Photochemistry and Nanobiotechnology; University of Brasília; Brasília Brazil
| | - Anderson J. Gomes
- Laboratory of Photochemistry and Nanobiotechnology; University of Brasília; Brasília Brazil
| | - Claure N. Lunardi
- Laboratory of Photochemistry and Nanobiotechnology; University of Brasília; Brasília Brazil
| | - Serge Kaliaguine
- Department of Chemical Engineering; Laval University; Québec City, QC Canada
| | - Gregory S. Patience
- Department of Chemical Engineering; Polytechnique Montréal; Montréal, QC Canada
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Chen X, Zheng Y, Huang F, Xiao Y, Cai G, Zhang Y, Zheng Y, Jiang L. Catalytic Activity and Stability over Nanorod-Like Ordered Mesoporous Phosphorus-Doped Alumina Supported Palladium Catalysts for Methane Combustion. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02420] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaohua Chen
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People’s Republic of China
| | - Yong Zheng
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, People’s Republic of China
| | - Fei Huang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People’s Republic of China
| | - Yihong Xiao
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, People’s Republic of China
| | - Guohui Cai
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, People’s Republic of China
| | - Yongchun Zhang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People’s Republic of China
| | - Ying Zheng
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, People’s Republic of China
| | - Lilong Jiang
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou, Fujian 350002, People’s Republic of China
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