Journal of Catalysis, Vol.372, 287-298, 2019
Kinetics of ceria-catalysed ethene oxychlorination
Oxychlorination of ethene was conducted in a microreactor (150-375 degrees C) over a thin layer of CeO2 prepared in the current work with the specific surface area of 80 m(2)/g and compared with the same reaction in millireactors (250-500 degrees C). The kinetic analysis revealed influence of the ethene concentration on the apparent activation energy which was different in micro- and millireactors. The previously developed reaction network was completed by including two parallel reactions for formation of ethylchloride and vinylchloride and two consecutive reactions accounting for formation of dichloroethane and vinylchloride via ethyl chloride. The reaction orders with respect to HCl and O-2 in the microreactor were comparable with the literature data for millireactors. Kinetic modeling was successfully carried for all reactants by using a steady state model of a packed bed reactor. (C) 2019 Elsevier Inc. All rights reserved.