Abstract
AbstractIn this contribution we investigate the aerobic propylene epoxidation over a Ag/KNO3/CaCO3 catalyst. The catalytic performance and surface speciation of the catalyst depends on the concentrations of feed modifiers such as ethyl chloride and nitric oxide, added to the feed to improve the selectivity by suppressing total combustion to CO2. After a kinetic characterization of the system, we investigate the kinetics in the presence of CO2. We demonstrate that CO2 alters the rate dependence in both reactants, affects the activation of O2, and results in the same maximum rate of propylene oxide formation.
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