KINETICS OF ISOTHERMAL AND NON-ISOTHERMAL PYROLYSIS OF OIL SHALE; pp. 415–424

The kinetics of decomposition of Huadian oil shale was studied by non-iso­thermal and isothermal methods. The non-isothermal weight loss was recorded at different heating rates (2, 5, 10, 15 and 20 K/min) up to 873 K. Two non-isothermal methods were applied for determination of kinetic para­meters: the direct Arrhenius plot method and integral method. The iso­thermal weight loss studies were carried out for one hour at different tem­peratures 623, 648, 673, 698 and 723 K. Activation energy and frequency factor were calculated.     The kinetic parameters evaluated from isothermal and non-isothermal kinetic data were compared with each other. As for the two non-isothermal analysis models, the integral method shows lower deviation and hence pro­vides a better fit of the data. The average results of non-isothermal experi­ments were similar to kinetic para­meters determined by isothermal analysis.