| Summary: | The aim of this work is to investigate the combustion behavior of pyrolysis oils derived from wheat straw and pine wood. The technique of thermogravimetric analysis (TGA) was applied to study the thermal treatment of the pyrolysis oils under well-controlled temperature in an oxidative (O2) and a non-oxidative (N2) environment. The thermogravimetric curves indicated that the combustion process of bio-oil was divided into three stages. It was found that the removal of water and evaporation of light volatiles occur at room temperature up to 200°C, the cracking of heavy fraction occurs at temperatures of between 200 and 500°C and, finally, the char combustion occurs at temperatures above 500°C. The thermal degradation of the both bio-oil samples showed an almost similar behavior in TGA experiment.
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