Kinetics of o-Xylene Combustion over a Pt/Alumina Catalyst

C. M. Manta, G. Bozga, G. Bercaru, C. S. Bîldea

Research output: Contribution to journalArticle

8 Citations (Scopus)

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 languageEnglish
Pages (from-to)2147-2154
Number of pages8
JournalChemical Engineering and Technology
Volume35
Issue number12
DOIs
Publication statusPublished - Dec 2012
Externally publishedYes

Fingerprint

Aluminum Oxide
Xylene
Alumina
Catalysts
Kinetics
Water
Surface reactions
Air
2-xylene
Oxygen
Adsorption
Atoms
Molecules

Keywords

  • Alumina
  • Catalytic combustion
  • Kinetics
  • Platinum

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

Cite this

Kinetics of o-Xylene Combustion over a Pt/Alumina Catalyst. / Manta, C. M.; Bozga, G.; Bercaru, G.; Bîldea, C. S.

In: Chemical Engineering and Technology, Vol. 35, No. 12, 12.2012, p. 2147-2154.

Research output: Contribution to journalArticle

Manta, CM, Bozga, G, Bercaru, G & Bîldea, CS 2012, 'Kinetics of o-Xylene Combustion over a Pt/Alumina Catalyst', Chemical Engineering and Technology, vol. 35, no. 12, pp. 2147-2154. https://doi.org/10.1002/ceat.201200371
Manta, C. M. ; Bozga, G. ; Bercaru, G. ; Bîldea, C. S. / Kinetics of o-Xylene Combustion over a Pt/Alumina Catalyst. In: Chemical Engineering and Technology. 2012 ; Vol. 35, No. 12. pp. 2147-2154.
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