TY - JOUR
T1 - Dry Reforming of Methane over Rare-Earth Metal Oxide Ni-M-Al (M = Ce, La) Catalysts
AU - Manabayeva, Alua
AU - Mäki-Arvela, Päivi
AU - Vajglová, Zuzana
AU - Martinez-Klimov, Mark
AU - Yevdokimova, Olha
AU - Peuronen, Anssi
AU - Lastusaari, Mika
AU - Tirri, Teija
AU - Kassymkan, Kaisar
AU - Baizhumanova, Tolkyn S.
AU - Zhumabek, Manapkhan
AU - Sarsenova, Rabiga O.
AU - Zheksenbaeva, Zauresh T.
AU - Kaumenova, Gulnar N.
AU - Russo, Vincenzo
AU - Murzin, Dmitry Yu
AU - Tungatarova, Svetlana A.
N1 - Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.
PY - 2023/12/6
Y1 - 2023/12/6
N2 - Dry reforming of methane (DRM) was investigated using Ni-M oxide catalysts prepared by solution combustion synthesis (SCS) and compared with Ni/α-Al2O3 synthesized by impregnation. According to X-ray diffraction, fresh oxide Ni-La and Ni-Ce catalysts displayed low crystallinity, which was improved after DRM, accompanied by the appearance of metallic Ni. Ni-Ce-Al and Ni-La-Al catalysts formed, respectively, CeAlO3 and LaAlO3 phases during the reaction. For studied catalysts featuring low surface areas ranging from 3 to 12 m2/g, the average metal particle sizes were 12-32 nm according to transmission electron microscopy, with the particles growing larger with time-on-stream (TOS) apart from Ni-α-Al2O3. DRM tests were conducted for different TOSs, demonstrating that the highest CH4 transformation rate was concomitant with the highest deactivation rate during 30 min of time-on-stream. The most stable performance in temperature stability experiments was demonstrated by the Ni-Ce-Al catalyst, for which, similar to other catalysts, the H2/CO ratio remained close to unity. In long-term stability tests, the Ni-Ce-Al catalyst displayed a 3.1-fold higher turnover frequency (TOF) compared with Ni-α-Al2O3, with no significant deactivation. The TOF values were comparable to the literature, highlighting the potential of SCS as an alternative approach for synthesis of DRM catalysts.
AB - Dry reforming of methane (DRM) was investigated using Ni-M oxide catalysts prepared by solution combustion synthesis (SCS) and compared with Ni/α-Al2O3 synthesized by impregnation. According to X-ray diffraction, fresh oxide Ni-La and Ni-Ce catalysts displayed low crystallinity, which was improved after DRM, accompanied by the appearance of metallic Ni. Ni-Ce-Al and Ni-La-Al catalysts formed, respectively, CeAlO3 and LaAlO3 phases during the reaction. For studied catalysts featuring low surface areas ranging from 3 to 12 m2/g, the average metal particle sizes were 12-32 nm according to transmission electron microscopy, with the particles growing larger with time-on-stream (TOS) apart from Ni-α-Al2O3. DRM tests were conducted for different TOSs, demonstrating that the highest CH4 transformation rate was concomitant with the highest deactivation rate during 30 min of time-on-stream. The most stable performance in temperature stability experiments was demonstrated by the Ni-Ce-Al catalyst, for which, similar to other catalysts, the H2/CO ratio remained close to unity. In long-term stability tests, the Ni-Ce-Al catalyst displayed a 3.1-fold higher turnover frequency (TOF) compared with Ni-α-Al2O3, with no significant deactivation. The TOF values were comparable to the literature, highlighting the potential of SCS as an alternative approach for synthesis of DRM catalysts.
UR - http://www.scopus.com/inward/record.url?scp=85179112467&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.3c02341
DO - 10.1021/acs.iecr.3c02341
M3 - Article
AN - SCOPUS:85179112467
SN - 0888-5885
VL - 62
SP - 20588
EP - 20607
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 48
ER -