Kinetics and Modeling of Mixture Effects during Complete Catalytic Oxidation of Benzene and Methyl tert-Butyl Ether

Abstract

The performance of a catalytic incinerator depends on the nature of the compounds being oxidized and cannot be predicted simply by knowing the performance of the incinerator with pure-component model compounds. Considering the importance of “mixture effects”, an attempt was made to develop a combined model to predict the conversion when benzene and methyl tert-butyl ether (MTBE) are simultaneously oxidized. Complete catalytic oxidation of benzene and MTBE, singly and in mixtures, was investigated over a platinum catalyst. No inhibition effects were seen with benzene, but MTBE conversion was distinctly inhibited by benzene. A Mars−van Krevelen rate model was used to explain the results. Model parameters were obtained from pure-component experiments and then incorporated into a multicomponent model without any adjustment or additional rate parameters. The multicomponent model was able to predict the conversion of benzene and MTBE oxidation in the binary mixture using the pure-component data without adjustable parameters.

A Comprehensive Study of Deep Catalytic Oxidation of Benzene, Toluene, Ethyl Acetate, and their Mixtures over Pd/ZSM-5 Catalyst: Mutual Effects and Kinetics

“…In a steady state, the rates of the oxidation and reduction must be equal, considering the overall stoichiometry of the reaction (α). This model is usually suitable for catalytic oxidation of VOCs over metal oxides (Dangi and Abraham 1997), supported Pd (Downie et al 1961), and Pt (Ordóñez et al 2002;Baldi 1993, 1994) catalysts. The following equations are thus derived:…”

Kinetic study of the combustion of ethanol and ethyl acetate mixtures over a MnCu catalyst

“…It has been experimentally observed that the kinetic behavior is different when the feed includes a single VOC or a mixture [4,5,12,[15][16][17][18][19]. Most of the contributions have studied mixtures containing aromatic compounds (like toluene or benzene) or oxygenates (like ethyl acetate).…”

“…Most of the contributions have studied mixtures containing aromatic compounds (like toluene or benzene) or oxygenates (like ethyl acetate). Although inhibition effects were frequently observed [12,15,19], sometimes a synergistic effect (enhancement of catalyst activity) was reported [16]. In some studies, even on the same catalyst, the mutual influence depends on the binary mixture.…”

Preparation and investigation of PD/TI‐SBA‐15 catalysts for catalytic oxidation of benzene

“…As known, the two-step redox model (according to the following Eqs. 1 and 2) was proposed for oxidation of hydrocarbons (HCs) over supported Pd catalysts [33]:…”