ABSTRACT
Inhibition of the reaction by the presence of maleic anhydride strongly suggests that both reagents Band Mare chemisorbed on the same sites on the catalyst surface.
The kinetic model of the catalytic oxidation of benzene based on reaction scheme (8.5) represents a good approximation at high conversions of benzene, i. e., when the formation of products such as quinone, phenol, etc., can be neglected. However, more elaborate studies must also take into account the formation of these secondary products. Most such studies comprise not only the kinetics of benzene oxidation but also oxidation of maleic anhydride, quinone, and phenol as was done by Ahmad et al. [56] and Inglot [57-60], as was already mentioned in Section II. D .1. It should here be mentioned that the former authors gave the most complete set of kinetic equations from which rate constants of processes indicated in scheme (8.8) could be calculated. However, their detailed presentation seems outside the scope of this text.
