Kinetic analysis of TiO2-catalyzed heterogeneous photocatalytic oxidation of ethylene using computational fluid dynamics

Hisahiro Einaga, Junya Tokura, Yasutake Teraoka, Kazuhide Ito

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Photocatalytic oxidation of ethylene was carried out over a TiO2 catalyst at 295K using two types of non-ideal fixed-bed flow reactors: a rectangular reactor and a cylindrical reactor. Computational fluid dynamics (CFD) analysis using a low Reynolds number-type k-ε turbulence model was conducted to investigate the ethylene oxidation behavior in the reactors at various gas flow rates and ethylene concentrations in the inlet gas (ethylene concentration of 50-250ppm and gas flow rate of 50-250mL/min). In the rectangular reactor, steady-state activities were obtained for ethylene oxidation under all conditions. The rate of ethylene oxidation on the TiO2 surface was analyzed in terms of Langmuir-Hinshelwood (L-H) type kinetics. The kinetic parameters for the surface reactions obtained via CFD analysis fit well with the experimental data. The CFD analysis also revealed that the ethylene concentration distribution in the reactor depended on the gas residence time distribution. We also carried out CFD analysis for the cylindrical reactor and compared the ethylene oxidation behavior with that in the rectangular reactor.

Original languageEnglish
Pages (from-to)325-335
Number of pages11
JournalChemical Engineering Journal
Volume263
DOIs
Publication statusPublished - Mar 1 2015

Fingerprint

computational fluid dynamics
ethylene
Ethylene
Computational fluid dynamics
oxidation
kinetics
Oxidation
Kinetics
dynamic analysis
Dynamic analysis
gas flow
Flow of gases
Gases
Flow rate
Residence time distribution
Intake systems
reactor
analysis
Surface reactions
Turbulence models

All Science Journal Classification (ASJC) codes

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

Cite this

Kinetic analysis of TiO2-catalyzed heterogeneous photocatalytic oxidation of ethylene using computational fluid dynamics. / Einaga, Hisahiro; Tokura, Junya; Teraoka, Yasutake; Ito, Kazuhide.

In: Chemical Engineering Journal, Vol. 263, 01.03.2015, p. 325-335.

Research output: Contribution to journalArticle

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AB - Photocatalytic oxidation of ethylene was carried out over a TiO2 catalyst at 295K using two types of non-ideal fixed-bed flow reactors: a rectangular reactor and a cylindrical reactor. Computational fluid dynamics (CFD) analysis using a low Reynolds number-type k-ε turbulence model was conducted to investigate the ethylene oxidation behavior in the reactors at various gas flow rates and ethylene concentrations in the inlet gas (ethylene concentration of 50-250ppm and gas flow rate of 50-250mL/min). In the rectangular reactor, steady-state activities were obtained for ethylene oxidation under all conditions. The rate of ethylene oxidation on the TiO2 surface was analyzed in terms of Langmuir-Hinshelwood (L-H) type kinetics. The kinetic parameters for the surface reactions obtained via CFD analysis fit well with the experimental data. The CFD analysis also revealed that the ethylene concentration distribution in the reactor depended on the gas residence time distribution. We also carried out CFD analysis for the cylindrical reactor and compared the ethylene oxidation behavior with that in the rectangular reactor.

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