Premium
New Multicomponent MoVSbNbCeO x /SiO 2 Catalyst with Enhanced Catalytic Activity for Oxidative Dehydrogenation of Ethane to Ethylene
Author(s) -
Zenkovets Galina A.,
Shutilov Alexey A.,
Bondareva Valentina M.,
Sobolev Vladimir I.,
Marchuk Alexander S.,
Tsybulya Sergey V.,
Prosvirin Igor P.,
Ishchenko Arcady V.,
Gavrilov Vladimir Yu.
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.202000489
Subject(s) - catalysis , ethylene , dehydrogenation , yield (engineering) , chemistry , inorganic chemistry , materials science , organic chemistry , metallurgy
In our study, we have obtained a multicomponent MoVSbNbCeO x /SiO 2 catalyst with high catalytic activity for oxidative dehydrogenation of ethane (ODE) to ethylene. To date, multicomponent MoVTe(Sb)NbO x catalysts, which have been intensively studied during the last years, were found as very promising for the ODE to produce ethylene. It was generally agreed that the MoVTeNbO x catalyst was more efficient than MoVSbNbO x . The major drawback of using Te‐containing catalysts is the presence of environmentally harmful, toxic tellurium, and its volatility during the catalyst preparation and catalytic reaction conditions. In our work, the Mo 1 V 0.24 Sb 0.23 Nb 0.08 Ce 0.01 O x /50 wt. % SiO 2 catalyst was prepared via the spray‐dry method of aqueous solutions of the starting components, followed by heat‐treatment in He at 350 and 600 °C. For comparative purpose, one of the best Te‐containing catalysts Mo 1 V 0.3 Te 0.23 Nb 0.12 O x was also tested in this reaction under the similar reaction conditions. A comparison of the catalytic properties of Sb− and Te− containing catalysts at the reaction temperature of 400–450 °C illustrates for both catalysts relatively high catalytic properties for ODE. The yield of ethylene of ca. 74 % was obtained for these catalysts, which exceeds the best yield reported in literature for Sb‐containing catalysts. The two main phases – M1 and M2 were revealed by XRD in the Sb‐containing catalyst. Intergrowth between the crystals of M1 and M2 phases with the formation of the interphase boundary in the highly active and selective Sb‐containing catalyst can be proposed from HRTEM results. The nature of the active state in this catalyst is discussed.