High-selectivity partial oxidation of methane into synthesis gas: the role of the red-ox transformations of rare earth — alkali earth cobaltate-based catalyst componentsстатья

Статья опубликована в высокорейтинговом журнале

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[1] High-selectivity partial oxidation of methane into synthesis gas: the role of the red-ox transformations of rare earth — alkali earth cobaltate-based catalyst components / A. G. Dedov, A. S. Loktev, D. A. Komissarenko et al. // Fuel Processing Technology. — 2016. — Vol. 148. — P. 128–137. La1+xSr1-xCoO4 (x = 0; 0.25) and NdCaCoO3.96 compounds with a layered perovskite-like structure synthesized by the solid state method and characterized by XRD, XPS, EDAX and H2-TPR were used as catalyst precursors for the partial oxidation of methane to synthesis gas. Catalytic tests were carried out in a quartz flow reactor using a CH4/O2 mixture without dilution with inert gases. The higher activity of the NdCaCoO4±δ-based catalyst in comparison with La1+xSr1-xCoO4 is associated with the easier formation of Nd and Ca oxides and metallic cobalt in the course of NdCaCoO4±δ reduction in the POM environment. Preliminary reduction of the catalysts with hydrogen leads to a significant increase in synthesis gas production at 800-850С. Different activity and selectivity of NdCaCoO4±δ and La1+xSr1-xCoO4-based catalysts can also be related to the different morphologies of metal-oxide nanocomposites that appear in the course of the reductive decomposition of cobaltates. [ DOI ]

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