Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Design of Ni-based catalysts supported over binary La-Ce oxides: Influence of La/Ce ratio on the catalytic performances in DRM. / Grabchenko, M.; Pantaleo, G.; Puleo, F. и др.
в: Catalysis Today, Том 382, 15.12.2021, стр. 71-81.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Design of Ni-based catalysts supported over binary La-Ce oxides: Influence of La/Ce ratio on the catalytic performances in DRM
AU - Grabchenko, M.
AU - Pantaleo, G.
AU - Puleo, F.
AU - Kharlamova, T. S.
AU - Zaikovskii, V. I.
AU - Vodyankina, O.
AU - Liotta, L. F.
N1 - Funding Information: This work was supported by Russian Foundation, Russia (project ID 19-73-30026 ), except for BET, XRD, TGA and H2-TPR analyses that were supported by the Project PON (2015-2020) Energie per l’Ambiente - Tecnologie e processi per l’Abbattimento di inquinanti e la bonifica di siti contaminati con Recupero di mAterie prime e produzioNe di energia TOtally green ( TARANTO )( ARS01_00637 ), Italy. The authors greatly acknowledge F. Giordano (ISMN-CNR, Italy) for XRD analyses. Publisher Copyright: © 2021 Elsevier B.V.
PY - 2021/12/15
Y1 - 2021/12/15
N2 - CeO2 and binary La2O3-CeO2 oxides, with different La/Ce atomic ratios (1:4; 1:1; 4:1), were synthesized using sol-gel method in the presence of citric acid in ammonia solution, at pH~9, and Ni (10 wt%) was added by wetness impregnation method. The physical-chemical properties, catalytic activity and long-run stability of the prepared catalysts were evaluated in DRM reaction. Characterizations of both fresh and spent catalysts were carried out using low-temperature N2 adsorption, XRD, TGA, TPR, Raman and TEM analyses. The DRM gradient catalytic tests performed in the range of 400–800 °C revealed higher catalytic conversions for Ni/La2O3-CeO2 catalysts, especially for those with La/Ce ratio 1:4 and 1:1. The stable conversions of CH4 and CO2 (long run at 650 °C for 24 h) registered for such Ni/La2O3-CeO2 catalysts were attributed to the presence of small Ni crystallites. During long run tests, Ni/La2O3-CeO2 catalysts, with La/Ce atomic ratios 1:4 and 1:1, formed the same types of carbon, both as filaments and layered carbon with graphene structure, but their catalytic activity was retained. Ni/CeO2 showed the smallest content of carbon, however, exhibited lower CH4 and CO2 conversions in comparison with the Ni-La2O3-CeO2 systems, due to the presence of big Ni particles with sizes of up to 0.5 µm.
AB - CeO2 and binary La2O3-CeO2 oxides, with different La/Ce atomic ratios (1:4; 1:1; 4:1), were synthesized using sol-gel method in the presence of citric acid in ammonia solution, at pH~9, and Ni (10 wt%) was added by wetness impregnation method. The physical-chemical properties, catalytic activity and long-run stability of the prepared catalysts were evaluated in DRM reaction. Characterizations of both fresh and spent catalysts were carried out using low-temperature N2 adsorption, XRD, TGA, TPR, Raman and TEM analyses. The DRM gradient catalytic tests performed in the range of 400–800 °C revealed higher catalytic conversions for Ni/La2O3-CeO2 catalysts, especially for those with La/Ce ratio 1:4 and 1:1. The stable conversions of CH4 and CO2 (long run at 650 °C for 24 h) registered for such Ni/La2O3-CeO2 catalysts were attributed to the presence of small Ni crystallites. During long run tests, Ni/La2O3-CeO2 catalysts, with La/Ce atomic ratios 1:4 and 1:1, formed the same types of carbon, both as filaments and layered carbon with graphene structure, but their catalytic activity was retained. Ni/CeO2 showed the smallest content of carbon, however, exhibited lower CH4 and CO2 conversions in comparison with the Ni-La2O3-CeO2 systems, due to the presence of big Ni particles with sizes of up to 0.5 µm.
KW - Dry reforming of methane (DRM)
KW - LaO-CeO binary oxide, solid solution
KW - Ni-based catalysts
UR - http://www.scopus.com/inward/record.url?scp=85111007876&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2021.07.012
DO - 10.1016/j.cattod.2021.07.012
M3 - Article
AN - SCOPUS:85111007876
VL - 382
SP - 71
EP - 81
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -
ID: 29293896