A Kinetic Study of the Stepwise Thermal Decomposition of Various Coals from Mongolia
Olga Yu. Fetisova, П. Н. Кузнецов, B. Purevsuren, B. Avid
Abstract
Abstract The thermolysis of Mongolian coals of different ranks was studied using thermal analysis (TG/DTG). The stepwise decomposition under conditions of programmed heating to 1000°C in an atmosphere of argon was found. The kinetic parameters of pyrolysis were determined based on thermogravimetric analysis with the use of model-fitting (Coats–Redfern) and model-free (Ozawa–Flynn–Wall) calculation methods. Changes in the activation energy with the degree of decomposition of the organic matter of coals of different ranks were established. A kinetic compensation effect was revealed, which was, probably due to the multicomponent composition of coals.
Topics & Concepts
ChemistryThermogravimetric analysisPyrolysisThermal decompositionDecompositionKinetic energyActivation energyArgonAnalytical Chemistry (journal)Physical chemistryOrganic chemistryQuantum mechanicsPhysicsThermal and Kinetic AnalysisThermochemical Biomass Conversion ProcessesCoal Combustion and Slurry Processing