Partial oxidation of methane to syngas over SmCoO3-derived catalysts: the effect of the supercritical fluid assisted modification of the perovskite precursor. (26th January 2023)

• Record Type: Journal Article
• Authors: Gavrikov, Andrey V.; Loktev, Alexey S.; Ilyukhin, Andrey B.; Mukhin, Igor E.; Bykov, Mikhail A.; Vorobei, Anton M.; Parenago, Olga O.; Cherednichenko, Kirill A.; Sadovnikov, Alexey A.; Dedov, Alexey G.
• Is Part Of: International journal of hydrogen energy. Volume 48:Number 8(2023)
• Page Start: 2998
• Page End: 3012
• Publication Date: 2023-01-26
• Subjects: Syngas -- Partial oxidation -- Lanthanide cobaltates -- Heterometallic precursors -- Supercritical antisolvent precipitation -- Solid-phase thermolysis; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.10.068
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Syngas is crucial raw for the production of hydrogen-rich gas for green energy and for various petrochemical processes. Herein, we report the Syngas production via partial oxidation of methane (POM) on new SmCoO3 -derived catalysts produced from simple individual precursor. Precursor modified by supercritical antisolvent precipitation (SAS) involving supercritical CO2 yields SmCoO3 with finer grains, and the catalytic activity of respective Co/Sm2 O3 composite formed in situ during POM is considerably enchanced. This catalyst does not undergo coking, and provides CO and H2 yields of 75–88% for 55 h at 900 °C, thereby being the most efficient POM catalysts derived from non-substituted LnCoO3 . Thus, the prospects of exploiting SAS modification of the precursor for SmCoO3 to enhance the catalytic activity of the daughter Co/Sm2 O3 composites are demonstrated for the first time. Given the overall simplicity in production, studied Co/Sm2 O3 composites can also be convenient systems for further development of POM catalysts. Graphical abstract: Image 1 Highlights: Precursor for SmCoO3 was modified by supercritical antisolvent precipitation (SAS). It improved catalytic activity of SmCoO3 in the Syngas production by POM. No preliminary reduction of SmCoO3 to Co/Sm2 O3 catalysts is required. Highest activity and stability as POM catalyst was achieved among LnCoO3 . Prospects of using SAS in the design of efficient Co/Sm2 O3 catalysts are shown.