Analysis of steady‐state reaction fronts in a porous medium

F. Escobedo, Hendrik J Viljoen

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A pseudohomogeneous model is used to analyze the steady state of a sharp reaction front in a porous medium. The reaction rate is described by the flame sheet approximation, and an asymptotic matching analysis is used to determine the temperature, conversion and position of the reaction front. Both adiabatic and nonadiabatic operations are considered, and the effect of radiation is included in the adiabatic case. The results show that there exists a maximum molar flux before blowout occurs. The critical molar flux is decreased by higher activation energies, but it is increased by higher rate constants and flame temperatures. Radiation further stabilizes the flame against blowout. Expressions are provided for the flame temperature, reactant conversion and the conditions when blowout occur. It is also shown that under certain conditions the front has two steady‐state positions.

Original languageEnglish (US)
Pages (from-to)1680-1686
Number of pages7
JournalAICHE Journal
Volume39
Issue number10
DOIs
StatePublished - 1993

Fingerprint

Porous materials
Temperature
Fluxes
Conversion Disorder
Radiation
Radiation Effects
Reaction rates
Rate constants
Activation energy

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

Cite this

Analysis of steady‐state reaction fronts in a porous medium. / Escobedo, F.; Viljoen, Hendrik J.

In: AICHE Journal, Vol. 39, No. 10, 1993, p. 1680-1686.

Research output: Contribution to journalArticle

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