Abstract
To investigate the thermal characteristics of castor oil pyrolysis, the fatty acid composition was firstly analyzed via gas chromatograph (GC). Then, the thermal characteristics was evaluated through the thermogravimetric analysis-derivative thermogravimetry (TGA-DTG) under nitrogen atmosphere at 5, 10, 15, and 20 K min-1 from 298.2 K to 873.2 K. Based on the iso-conversional method, pyrolysis kinetic parameter of the activation energy was calculated by the free model approaches of Kissinger-Akahira-Sunose method (KAS) and Flynn-Wall-Ozawa method (FWO). In addition, the reaction order was calculated through Avrami theory. The average activation energy values were calculated as 202.88 kJ mol-1 and 203.66 kJ mol-1 for KAS method and FWO method, respectively. And the average value of reaction order is 1.02.
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