Study of the Influence Exerted by Zinc Additive on the Structure and Catalytic Properties of Pd/Al2O3 Catalysts for Liquid-Phase Hydrogenation of Acetylene


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Resumo

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.

Sobre autores

E. Khramov

Kurchatov Institute Research Center

Email: omsk-glyzdova@mail.ru
Rússia, ul. Akademika Kurchatova 1, Moscow, 123098

T. Gulyaeva

Institute of Hydrocarbons Processing, Siberian Branch

Email: omsk-glyzdova@mail.ru
Rússia, ul. Neftezavodskaya 54, Omsk, 644040

M. Trenikhin

Institute of Hydrocarbons Processing, Siberian Branch; Omsk State Technical University; Omsk Scientific Center; Siberian Branch

Email: omsk-glyzdova@mail.ru
Rússia, ul. Neftezavodskaya 54, Omsk, 644040; pr. Mira 11, Omsk, 644050; Omsk, 644024

D. Shlyapin

Institute of Hydrocarbons Processing, Siberian Branch

Email: omsk-glyzdova@mail.ru
Rússia, ul. Neftezavodskaya 54, Omsk, 644040

P. Tsyrul’nikov

Institute of Hydrocarbons Processing, Siberian Branch

Email: omsk-glyzdova@mail.ru
Rússia, ul. Neftezavodskaya 54, Omsk, 644040

D. Glyzdova

Institute of Hydrocarbons Processing, Siberian Branch

Autor responsável pela correspondência
Email: omsk-glyzdova@mail.ru
Rússia, ul. Neftezavodskaya 54, Omsk, 644040

N. Smirnova

Kurnakov Institute of General and Inorganic Chemistry

Email: omsk-glyzdova@mail.ru
Rússia, Moscow, 117901

V. Temerev

Institute of Hydrocarbons Processing, Siberian Branch

Email: omsk-glyzdova@mail.ru
Rússia, ul. Neftezavodskaya 54, Omsk, 644040

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