Kinetic Study of the Selective Hydrogenation of Acetylene over Supported Palladium under Tail-End Conditions

Caroline Urmès (1, 2) , Jean-Marc Schweitzer (1) , Amandine Cabiac (1) , Yves Schuurman (3, 2)

1 IFPEN - IFP Energies nouvelles
2 ING - IRCELYON-Ingéniérie, du matériau au réacteur
3 IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon

The kinetics of the selective hydrogenation of acetylene in the presence of an excess of ethylene has been studied over a 0.05 wt. % Pd/α-Al 2 O 3 catalyst. The experimental reaction conditions were chosen to operate under intrinsic kinetic conditions, free from heat and mass transfer limitations. The data could be described adequately by a Langmuir-Hinshelwood rate-equation based on a series of sequential hydrogen additions according to the Horiuti-Polanyi mechanism. The mechanism involves a single active site on which both the conversion of acetylene and ethylene take place.

Keywords: power-law; Langmuir-Hinshelwood; kinetic modeling; Pd/α-Al 2 O 3

Domains: Chemical Sciences; Catalysis

Caroline Urmès, Jean-Marc Schweitzer, Amandine Cabiac, Yves Schuurman. Kinetic Study of the Selective Hydrogenation of Acetylene over Supported Palladium under Tail-End Conditions. Catalysts, 2019, 9 (2), pp.180. ⟨10.3390/catal9020180⟩. ⟨hal-02101127⟩