Analysis on combustion of oil sludge from Shengli oil field

The oil sludge's combustion and pyrolysis TG and DTG curves were obtained through thermogravimetric analysis experiments on the properties of oily sludge from ShengLi oil field. The differences of combustion and pyrolysis thermal curves were analyzed. The TG-DTG method was employed to determine the ignition and burnout temperatures at different heating rates. The differences of the ignition and burnout temperature and combustion characteristic index at different heating rates demonstrate that the heating rate has some impacts on the oil sludge combustion. Coats-Redfern integral model was adopted to obtain the combustion kinetic parameters including activation energy, pre-exponential factor and reaction order. The results show that, with the increase of the heating rate, the oil sludge's combustion rate, the ignition and burnout temperatures of oily sludge, and the calculated value of oil sludge's combustion kinetic parameters such as activation energy would increase.