Comparison of mechanistic models for the catalytic oxidation of trichloroethylene over Cr/Al2O3 and Al-Cr/porous glass catalysts

Oguz H., Koch S., Weisweiler W.

CHEMICAL ENGINEERING & TECHNOLOGY, vol.23, no.5, pp.395-400, 2000 (SCI-Expanded) identifier

  • Publication Type: Article / Review
  • Volume: 23 Issue: 5
  • Publication Date: 2000
  • Journal Name: CHEMICAL ENGINEERING & TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.395-400
  • Ankara University Affiliated: No

Abstract

In this study the catalytic oxidation of trichloroethylene was investigated in a fixed bed tubular reactor system that consisted of a 50 cm long and 3 cm inner diameter quartz glass tube packed with the catalyst. The Cr/Al2O3 catalyst (Cat. I) contains 3.8 w/o Cr and the Al-Cr/porous glass catalysts (Cat. II) contain in one set 5.5 w/o Al and 9.6 w/o Cr and in the other set 6.2 w/o Al and 11.7 w/o Cr. The two types of catalysts were prepared by impregnation procedure. A number of kinetic rate expressions were evaluated for their ability to fit the experimental data to the integral reactor equation using SimuSolv packet program. The temperature influence on the reaction rate constants and the adsorption equilibrium constants were correlated simultaneously using Arrhenius and van't Hoff equations, respectively. The kinetic rate expression, based on Rideal-Eley type model, describes well the integral conversion data for Cat. I while Langmuir-Hinshelwood/Hougen-Watson type model describes well the integral conversion data for Cat. II over the range of conditions investigated.