Rapid carbonization process using heat storage materials and characterization of the obtained char

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Abstract

Carbonization behavior of biomass in the rapid carbonization/pulverized process using heat storage materials was experimentally examined. Biomass samples were charged into a rotary kiln-type electric furnace with stainless balls. Obtained biomass chars were evaluated by means of gasification test in CO2 atmosphere using a thermal gravimetry. The char was classified into two type, "fine" and "coarse", by particle size. "Coarse" char contracted with increasing holding temperature. Crashing of biomass char was observed at the holding temperatures over 600°C and fine char was formed. Melted structure was observed on the surface of "coarse" char indicating rapid heating. Yields of the total char are decreased with increasing holding temperature due to vaporization of volatile matters like tar. On the other hand, the yield of "fine" char is increased with increasing rotation speed when carbonization reaction sufficiently proceeded. The char obtained by the present carbonization experiment at between 600 and 800°C for 10 min showed similar gasification property with CO2 to that prepared by normal carbonization at 800°C for 1 h.

Original languageEnglish
Pages (from-to)730-735
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume102
Issue number12
DOIs
Publication statusPublished - 2016 Jan 1

Keywords

  • Biomass char
  • Gasification
  • Rapid carbonization
  • Recovery of waste heat
  • Rotary kiln

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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