Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Oxidative dehydrogenation of ethane over M1 MoVNbTeO catalysts modified by the addition of Nd, Mn, Ga or Ge. / Lazareva, E. V.; Bondareva, V. M.; Svintsitskiy, D. A. и др.
в: Catalysis Today, Том 361, 01.02.2021, стр. 50-56.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Oxidative dehydrogenation of ethane over M1 MoVNbTeO catalysts modified by the addition of Nd, Mn, Ga or Ge
AU - Lazareva, E. V.
AU - Bondareva, V. M.
AU - Svintsitskiy, D. A.
AU - Ishchenko, A. V.
AU - Marchuk, A. S.
AU - Kovalev, E. P.
AU - Kardash, T. Yu
N1 - This work was supported by the Russian Science Foundation, grant 17-73-20073.
PY - 2021/2/1
Y1 - 2021/2/1
N2 - Modification by Nd, Mn, Ga, and Ge substantially affect both physicochemical and catalytic properties of MoVNbTeO oxides in the oxidative dehydrogenation of ethane (ODE). The introduction of modifying additives changes the content of the M1 phase, surface acidity, and surface composition. It does not have an influence on the state of Mo, V, Nb, and Te on catalyst surface, but it induces surface enrichment (Ga, Mn) or depletion (Ge, Nd) by the modifying element. All of these additives have positive effects on catalytic properties at the M/Mo (M = modifying element) ratio of 0.0075 ÷ 0.025. They exhibit an increase of activity and prevent ethylene over-oxidation. The relationship between the rate constant of total ethane transformation and the M1 content confirms that this phase is active in ODE. The correlation between ethylene selectivity and the relative number of intermediate acid sites is revealed, indicating the role of surface acidity on ethylene over-oxidation.
AB - Modification by Nd, Mn, Ga, and Ge substantially affect both physicochemical and catalytic properties of MoVNbTeO oxides in the oxidative dehydrogenation of ethane (ODE). The introduction of modifying additives changes the content of the M1 phase, surface acidity, and surface composition. It does not have an influence on the state of Mo, V, Nb, and Te on catalyst surface, but it induces surface enrichment (Ga, Mn) or depletion (Ge, Nd) by the modifying element. All of these additives have positive effects on catalytic properties at the M/Mo (M = modifying element) ratio of 0.0075 ÷ 0.025. They exhibit an increase of activity and prevent ethylene over-oxidation. The relationship between the rate constant of total ethane transformation and the M1 content confirms that this phase is active in ODE. The correlation between ethylene selectivity and the relative number of intermediate acid sites is revealed, indicating the role of surface acidity on ethylene over-oxidation.
KW - Gallium
KW - Germanium
KW - Manganese
KW - MoVNbTeO
KW - Neodymium
KW - Oxidative dehydrogenation of ethane
UR - http://www.scopus.com/inward/record.url?scp=85077344579&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2019.12.029
DO - 10.1016/j.cattod.2019.12.029
M3 - Article
AN - SCOPUS:85077344579
VL - 361
SP - 50
EP - 56
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -
ID: 23053640