Heat transfer within highly porous chars: A review

Isaac I. Kantorovich, Ezra Bar-Ziv

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

The review summarizes heat transfer mechanisms for highly porous chars. It provides a brief discussion on global models for thermal conductivity that consider mostly total porosity and a more detailed discussion of models considering details of the microstructure and phonon heat transport within microcrystals. The review includes recent methods for experimental determination of thermal conductivity of single small particles. A description of how thermal conductivity of highly porous chars changes under oxidation, in the range of zero to full burnout, was provided. This review emphasizes the necessity of a detailed description of all aspects that may contribute to the thermal conductivity of highly porous chars, such as macro- and microstructures, microcrystal orientation, microcrystal dimensions and connectivity.

Original languageEnglish
Pages (from-to)279-299
Number of pages21
JournalFuel
Volume78
Issue number3
DOIs
StatePublished - 1 Jan 1999

Keywords

  • Char oxidation
  • Chars
  • Heat transfer
  • Porous structure
  • Thermal conductivity

ASJC Scopus subject areas

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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