Effect of Pressure on the Oxidation Kinetics of Asphaltenes

This study was carried out with the aim of evaluating the effect of the high pressure on the oxidation kinetics of n-heptane-insoluble asphaltenes, obtained from an extra-heavy crude oil. Thermogravimetric analyses (TGA) were performed under an air atmosphere, at different pressures from 0.084 to 7 MPa, and temperatures from 100 to 600 °C at different heating ramps of 5, 10, and 15 °C min–1. The effective activation energy and the kinetic...