Pyrolysis characteristics of Kazakhstan coals in non-isothermal and isothermal conditions

Diyar Tokmurzin, Ho Won Ra, Sung Min Yoon, Sang Jun Yoon, Jae Goo Lee, Myung Won Seo, Desmond Adair

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This study provides combined isothermal and non-isothermal pyrolysis properties of Kazakhstan coals necessary for development and optimization of thermal processes. Devolatilization properties are investigated using thermogravimetric analysis, thermobalance reactor, and wire-mesh reactor experiments at temperatures from 400°C to 1,000°C. Maikuben coal has the highest reactivity at 900°C and Shubarkol coal has lowest ash initial deformation. Turgay coal demonstrates high gas yield at 800°C and above. At temperatures above 800°C tar cracking intensifies, but tar release from Shubarkol coal increased reaching 8.06% of initial mass at 1,000°C. Results demonstrate that Shubarkol and Turgay coals are favorable gasification feedstock.

Original languageEnglish
Pages (from-to)254-274
Number of pages21
JournalInternational Journal of Coal Preparation and Utilization
Volume42
Issue number3
DOIs
StatePublished - 2022

Keywords

  • Coal devolatilization
  • devolatilization gas species
  • devolatilization kinetics
  • devolatilization products
  • thermobalance reactor
  • wire-mesh reactor

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