Oxychlorination of ethene was conducted in a microreactor (150–375 °C) over a thin layer of CeO₂ prepared in the current work with the specific surface area of 80 m²/g and compared with the same reaction in millireactors (250–500 °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 O₂ 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.