Design of Ni-Based Catalysts Supported over Binary La-Ce Oxides: Influence of La/Ce Ratio on the Catalytic Performances in DRM Full article
| Journal |
Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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| Output data | Year: 2021, Volume: 382, Pages: 71-81 Pages count : 11 DOI: 10.1016/j.cattod.2021.07.012 | ||||||||
| Tags | Dry reforming of methane (DRM); Ni-based catalysts; La2O3-CeO2 binary oxide, solid solution | ||||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Science Foundation | 19-73-30026 (АААА-А19-119052990037-6) |
| 2 | Ministry of Education, Universities and Research | ARS01_00637 |
Abstract:
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.
Cite:
Grabchenko M.
, Pantaleo G.
, Puleo F.
, Kharlamova T.S.
, Zaikovskii V.I.
, Vodyankina O.
, Liotta L.F.
Design of Ni-Based Catalysts Supported over Binary La-Ce Oxides: Influence of La/Ce Ratio on the Catalytic Performances in DRM
Catalysis Today. 2021. V.382. P.71-81. DOI: 10.1016/j.cattod.2021.07.012 WOS Scopus РИНЦ ANCAN OpenAlex
Design of Ni-Based Catalysts Supported over Binary La-Ce Oxides: Influence of La/Ce Ratio on the Catalytic Performances in DRM
Catalysis Today. 2021. V.382. P.71-81. DOI: 10.1016/j.cattod.2021.07.012 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Apr 29, 2021 |
| Accepted: | Jul 9, 2021 |
| Published online: | Jul 14, 2021 |
| Published print: | Dec 15, 2021 |
Identifiers:
| Web of science: | WOS:000707642300001 |
| Scopus: | 2-s2.0-85111007876 |
| Elibrary: | 46971579 |
| Chemical Abstracts: | 2021:1727397 |
| Chemical Abstracts (print): | 178:55769 |
| OpenAlex: | W3183893369 |