Based on composition analysis of extract oil and pyrolysis oil from oil sludge

the pyrolysis characteristics of oil sludge in the air were studied experimentally using thermal gravimetric analyzer. The thermogravimetry and differential thermal analysis curve were investigated under different heating rate. Based on Coats-Redfern integral method

the adjusted R- square coefficient of ln [g(a)/T2] versus 1/T for TG datum between 200 and 600℃ was analyzed using nine kinds of different kinetics mechanism functions. The activation energy of reaction and the pre-exponential factor were fitted. The results indicated that TG and DTA curve of oil sludge shifted to higher temperature with the increase of the heating rates. There are two temperature stages in the pyrolysis of oil sludge: 200—400℃ and 400—600℃. The kinetics reaction process of the sample complies with reaction mechanisms of the three dimensional diffusion in the first stage. Pyrolysis reaction of oil sludge of the second stage is in accordance with the rules of the first-order reaction.