Thermal analysis of Beypazari lignite

KÖK M. V.

JOURNAL OF THERMAL ANALYSIS, vol.49, no.2, pp.617-625, 1997 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 49 Issue: 2
  • Publication Date: 1997
  • Doi Number: 10.1007/bf01996744
  • Journal Name: JOURNAL OF THERMAL ANALYSIS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.617-625
  • Keywords: combustion, kinetics, lignite, thermal analysis, DIFFERENTIAL SCANNING CALORIMETRY, THERMOGRAVIMETRIC ANALYSIS, HEATING RATE, COAL, COMBUSTION, PYROLYSIS, MIXTURES
  • Middle East Technical University Affiliated: Yes

Abstract

Beypazari lignite was investigated by differential scanning calorimetry (DSC), thermogravimetry (TG), high pressure thermogravimetry (HPTG) and combustion cell experiments. All the experiments were conducted at non-isothermal heating conditions with a heating rate of 10 degrees C min(-1), in the temperature range of 20-700 degrees C. DSC-TG data were analysed using an Arrhenius-type reaction model assuming a first-order reaction. For the HPTG data the Coats and Redfern equation was used for kinetic analysis. In the combustion cell experiments the Fassihi and Brigham approach was used in order to calculate kinetic data. Finally a comparison is made between the kinetic results.