Abstract
Effect of the phase composition of aluminum oxide [γ- and (δ + θ) phase] and introduction of zinc additives on the catalytic properties of 0.5% Pd/Al2O3 systems in the reaction of liquid-phase hydrogenation of acetylene into ethylene under an elevated pressure in a flow-through mode was studied. An increase in the activity of the Pd catalyst upon modification with zinc is only observed in the case of a system supported by the mixed phase of (δ + θ) aluminum oxide. XAFS spectroscopy was used to find that the increase in the activity and selectivity with respect to ethylene (in the presence of carbon monoxide) on the (0.5% Pd–0.62% Zn)/(δ + θ)-Al2O3 catalyst is correlated with the formation of the PdZn intermetallic compound.
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Original Russian Text © D.V. Glyzdova, N.S. Smirnova, V.L. Temerev, E.V. Khramov, T.I. Gulyaeva, M.V. Trenikhin, D.A. Shlyapin, P.G. Tsyrul’nikov, 2017, published in Zhurnal Prikladnoi Khimii, 2017, Vol. 90, No. 11, pp. 1575−1585.
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Glyzdova, D.V., Smirnova, N.S., Temerev, V.L. et al. Study of the Influence Exerted by Zinc Additive on the Structure and Catalytic Properties of Pd/Al2O3 Catalysts for Liquid-Phase Hydrogenation of Acetylene. Russ J Appl Chem 90, 1908–1917 (2017). https://doi.org/10.1134/S1070427217120035
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DOI: https://doi.org/10.1134/S1070427217120035