caa a22 4500 465743153 CHVBK 20180323111813.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF02697344 doi (NATIONALLICENCE)springer-10.1007/BF02697344 Park Dae Department of Chemical Engineering, Pusan National University, 609-735, Pusan, Korea aut A transient kinetic study of ethylene epoxidation over Ag/SiO2 [Elektronische Daten] [Dae Park] 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. Korean Institute of Chemical Engineering, 1990 Korean Journal of Chemical Engineering Springer-Verlag 7/1(1990-01-01), 69-73 0256-1115 7:1<69 1990 7 11814 https://doi.org/10.1007/BF02697344 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02697344 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Park Dae Department of Chemical Engineering, Pusan National University, 609-735, Pusan, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer-Verlag 7/1(1990-01-01), 69-73 0256-1115 7:1<69 1990 7 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer