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A transient kinetic study of ethylene epoxidation over Ag/SiO2

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Abstract

Transient kinetics of ethylene epoxidation over a Ag/SiO2 catalyst has been studied at relatively low temperatures (110-130‡C) using an automated square pulse cyclic reactor. It is observed at this low temperatures that the formation of CO2 and H2O was retarded compared to epoxide formation. The 100% selectivity toward ethylene oxide was obtained after hydrogen treatment of the catalyst surface. It indicates that maximum selectivity of 6/7 based on classical molecular oxygen hypothesis should be carefully reviewed. The participation of both atomic and molecular oxygen to epoxide formation was posiulated, but the former probably after recombination with subsurface oxygen.

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Authors and Affiliations

  1. Department of Chemical Engineering, Pusan National University, 609–735, Pusan, Korea

    Dae Won Park

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  1. Dae Won Park
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Park, D.W. A transient kinetic study of ethylene epoxidation over Ag/SiO2 . Korean J. Chem. Eng. 7, 69–73 (1990). https://doi.org/10.1007/BF02697344

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  • DOI: https://doi.org/10.1007/BF02697344

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