Abstract
o-Xylene combustion in air over a Pt/γ-Al2O3 catalyst was investigated in a laboratory reactor at low concentrations typical for depollution applications. The results evidenced a slightly negative influence of o-xylene concentration on combustion rate. A kinetic model of the combustion process was developed by using the Langmuir-Hinshelwood mechanism, assuming the surface reaction between adsorbed oxygen atoms and adsorbed o-xylene molecules as controlling step. The rate expression includes the influences of o-xylene and water adsorption on the active centers of the catalyst. The estimation of rate expression parameters is based on o-xylene conversion measurements obtained under conditions free of influences of physical steps. The o-xylene combustion in air over a Pt/γ-Al2O3 catalyst was studied under conditions typical for depollution applications. A kinetic model based on the Langmuir-Hinshelwood mechanism is formulated, accounting for the experimentally observed negative influences of o-xylene and water concentrations on process kinetics. The reliability of the proposed model is demonstrated by comparing its predictions with measurements.
Original language | English |
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Pages (from-to) | 2147-2154 |
Number of pages | 8 |
Journal | Chemical Engineering and Technology |
Volume | 35 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 1 2012 |
Keywords
- Alumina
- Catalytic combustion
- Kinetics
- Platinum
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering