Abstract
A thermogravimetric (TG) experiment was conducted to study the oxidation process of a certain heavy oil sample mixing with quartz sand, and the oxidation process is described in detail by combining the multipeaks shape of TG curve with heavy oil's oxidation theory. Four stages of weight loss corresponding to earlier low temperature oxidation (LTO), later LTO, fuel deposition, and HTO(high temperature oxidation) were identified, and the demarcation points were clearly defined. Activation energy of each stage was figured by Flynn-Wall-Ozawa method. Compared with the conventional division method, four stages can describe the different stages of oxidation in more detail.
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