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Gavrikov AV, Loktev AS, Ilyukhin AB, Mukhin IE, Bykov MA, Maslakov KI, Vorobei AM, Parenago OO, Sadovnikov AA, Dedov AG. Supercritical fluid-assisted modification combined with the resynthesis of SmCoO 3 as an effective tool to enhance the long-term performance of SmCoO 3-derived catalysts for the dry reforming of methane to syngas. Dalton Trans 2022; 51:18446-18461. [PMID: 36416592 DOI: 10.1039/d2dt03026h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The dry reforming of methane to syngas (DRM) is of increasing significance concerning, first, the production of raw materials for commercial organic/petrochemical syntheses and for hydrogen energetic, and, second, the utilization of two most harmful greenhouse gases. Herein, new SmCoO3-based DRM catalysts derived from heterometallic precursors and operated without preliminary reduction are reported. For the first time, the effect of supercritical fluids-assisted modification of the SmCoO3-derived catalysts combined with the re-oxidation of spent catalysts to SmCoO3 onto its long-term performance was studied. In particular, the modification of heterometallic precursors by supercritical antisolvent precipitation (SAS) considerably decreases coke formation upon the exploitation of the derived SmCoO3 sample. Moreover, the re-oxidation of the corresponding spent catalysts followed by pre-heating under N2 affords catalysts that stably provide syngas yields of 88-95% for at least 41 h at 900 °C. The achieved yields are among the highest ones currently reported for DRM catalysts derived from both LnMO3 perovskites and related oxides. The origins of such good performance are discussed. Given the simplicity and availability of all the applied methods and chemicals, this result opens prospects for exploiting SAS in the design of efficient DRM catalysts.
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Affiliation(s)
- Andrey V Gavrikov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Alexey S Loktev
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation. .,National University of Oil and Gas "Gubkin University", Moscow, Russian Federation.,A.V. Topchiev Institute of Petrochemical Synthesis, RAS, Moscow, Russian Federation
| | - Andrey B Ilyukhin
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Igor E Mukhin
- National University of Oil and Gas "Gubkin University", Moscow, Russian Federation
| | - Mikhail A Bykov
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Konstantin I Maslakov
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Anton M Vorobei
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Olga O Parenago
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation.
| | - Alexey A Sadovnikov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation. .,A.V. Topchiev Institute of Petrochemical Synthesis, RAS, Moscow, Russian Federation
| | - Alexey G Dedov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation. .,National University of Oil and Gas "Gubkin University", Moscow, Russian Federation.,A.V. Topchiev Institute of Petrochemical Synthesis, RAS, Moscow, Russian Federation
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Malyshev SA, Shlyakhtin OA, Loktev AS, Mazo GN, Timofeev GM, Mukhin IE, Svetogorov RD, Roslyakov IV, Dedov AG. Ni/(R 2O 3,CaO) Nanocomposites Produced by the Exsolution of R 1.5Ca 0.5NiO 4 Nickelates (R = Nd, Sm, Eu): Rare Earth Effect on the Catalytic Performance in the Dry Reforming and Partial Oxidation of Methane. Materials (Basel) 2022; 15:7265. [PMID: 36295329 PMCID: PMC9610205 DOI: 10.3390/ma15207265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/13/2022] [Accepted: 10/15/2022] [Indexed: 06/16/2023]
Abstract
In order to clarify the role of R2O3 in the metal-oxide catalysts derived from complex oxide precursors, a series of R1.5Ca0.5NiO4 (R = Nd, Sm, Eu) complex oxides was obtained. A significant systematic increase in the orthorhombic distortion of the R1.5Ca0.5NiO4 structure (K2NiF4 type, Cmce) from Nd to Eu correlates with a corresponding decrease in their ionic radii. A reduction of R1.5Ca0.5NiO4 in the Ar/H2 gas mixture at 800 °C causes a formation of dense agglomerates of CaO and R2O3 coated with spherical 25-30 nm particles of Ni metal. The size of metal particles and oxide agglomerates is similar in all Ni/(R2O3,CaO) composites in the study. Their morphology is rather similar to the products of redox exsolution obtained by the partial reduction of complex oxides. All obtained composites demonstrated a significant catalytic activity in the dry reforming (DRM) and partial oxidation (POM) of methane at 700-800 °C. A systematic decrease in the DRM catalytic activity of composites from Nd to Eu could be attributed to the basicity reduction of R2O3 components of the composite catalysts. The maximum CH4 conversion in POM reaction was observed for Ni/(Sm2O3,CaO), while the maximum selectivity was demonstrated by Nd2O3-based composite. The possible reasons for the observed difference are discussed.
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Affiliation(s)
- Sergey A. Malyshev
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
- Department of Materials Sciences, Shenzhen MSU-BIT University, Shenzhen 518172, China
| | - Oleg A. Shlyakhtin
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Alexey S. Loktev
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia
- Department of General and Inorganic Chemistry, Gubkin Russian State University of Oil and Gas, 119991 Moscow, Russia
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Galina N. Mazo
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Grigoriy M. Timofeev
- Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Igor E. Mukhin
- Department of General and Inorganic Chemistry, Gubkin Russian State University of Oil and Gas, 119991 Moscow, Russia
| | | | - Ilya V. Roslyakov
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
- Department of Materials Sciences, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Alexey G. Dedov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia
- Department of General and Inorganic Chemistry, Gubkin Russian State University of Oil and Gas, 119991 Moscow, Russia
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
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Zagaynov IV, Loktev AS, Mukhin IE, Konovalov AA, Dedov AG. Effect of the oxidizing capacity of ceria-based support on the conversion of methane to syngas. Mendeleev Communications 2022. [DOI: 10.1016/j.mencom.2022.01.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dedov AG, Karavaev AA, Loktev AS, Mitinenko AS, Mukhin IE, Isaeva EA, Rogaleva EV, Moiseev II. Conversion of ethyl acetate into benzene–toluene–xylene fraction over MFI zeolite-based catalysts. Mendeleev Communications 2020. [DOI: 10.1016/j.mencom.2020.07.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Zagaynov IV, Loktev AS, Mukhin IE, Konovalov AA, Dedov AG, Moiseev II. Trimetallic NiCoM catalysts (M = Mn, Fe, Cu) for methane conversion into synthesis gas. Mendeleev Communications 2019. [DOI: 10.1016/j.mencom.2019.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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