Ni-Ru-containing mixed oxide-based composites as precursors for ethanol steam reforming catalysts: Effect of the synthesis methods on the structural and catalytic properties
Naurzkulova S.M. Arapova M.V. Ishchenko A.V. Krieger T.A. Saraev A.A. Kaichev V.V. Rogov V.A. Krasnov A.V. Massalimova B.K. Sadykov V.A.
1 January 2021De Gruyter Open Ltd
Open Chemistry
2021#19Issue 1696 - 708 pp.
Ethanol steam reforming catalysts precursors, i.e., nanocomposites of complex oxides with the general formula [Pr0.15Sm0.15Ce0.35Zr0.35O2 + LaMn0.45Ni0.45Ru0.1O3] (1:1 by mass), were synthesized by three different methods. It was shown that two synthesis methods - ultrasonic dispersion and sequential polymeric method, lead to the formation of the nanocomposite perovskite-fluorite system with the specific surface area up to 50 m2/g. Reduction of samples at 400-500°C lead to the formation of Ni-Ru alloy nanoparticles strongly bound with the surface of oxide nanocomposite. Catalytic tests in ethanol steam reforming reaction at 500-600°C showed the highest specific activity of the sample prepared by the sequential polymeric method due to the location of Ni- and Ru-containing perovskite mainly on the surface of the composite providing a high concentration of active metal centers. At higher temperatures for all samples, ethanol conversion approached 100% with hydrogen yield varying in the range of 65-75%. A study of spent catalysts confirmed the absence of carbon deposits after long-term catalytic tests at 650°C.
Ethanol , Fluorite , Hydrogen , Perovskite , Reforming
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Department of Heterogeneous Catalysis, Federal Research Center, Boreskov Institute of Catalysis, Lavrentiev Ave. 5, Novosibirsk, 630090, Russian Federation
Department of Natural Sciences, Novosibirsk State University, Pirogova St. 2, Novosibirsk, 630090, Russian Federation
Department of Chemistry and Chemical Technology, M. Kh. Dulaty Taraz Regional University, Tole Bi Str., 60, Taraz, 080000, Kazakhstan
Department of Heterogeneous Catalysis, Federal Research Center, Boreskov Institute of Catalysis, Lavrentiev Ave. 5, Novosibirsk, 630090, Russian Federation
Catalyst Research Department, Federal Research Center, Boreskov Institute of Catalysis, Lavrentiev Ave. 5, Novosibirsk, 630090, Russian Federation
Department of Heterogeneous Catalysis
Department of Natural Sciences
Department of Chemistry and Chemical Technology
Department of Heterogeneous Catalysis
Catalyst Research Department
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