Abstract
Abstract In this research, pressurized differential scanning calorimeter (PDSC) were used to estimate the thermal and kinetic behaviour of two different crude oils from Tatarstan oil fields under three different pressures (100, 600, 2000 kPa) at a constant heating rate (10 °C/min). The heat flow curves of both crude oils indicated two reaction regions known as low temperature oxidation (LTO) and high temperature oxidation (HTO). The reaction intervals were shifted to lower temperature regions with the increase in pressure. The activation energies were calculated according to Borchardt & Daniels and Roger & Morris methods and it was observed that the activation energies were decreasing at elevated pressures.
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