The Pyrolysis Characteristics and Kinetic Analysis of Maoming Oil Shale Heated by Transition Metal Salt Assisted Steam

In this work, a series of experiments on pyrolysis of Maoming oil shale were conducted in a self-made reactor, in order to investigate the pyrolysis characteristics and the pyrolysis kinetic of Maoming oil shale heated by transition metal salt (CoCl 2 ) assisted steam. The experimental results show that compared with conventional and steam heating, the combined physical and chemical action of transition metal salt assisted steam heating can reduce the initial pyrolysis temperature and apparent activation energy of oil shale, and increase its mass loss. The transition metal salt assisted steam preheating treatment of oil shale near the initial pyrolysis temperature is beneficial to the overall pyrolysis effect of oil shale pyrolysis. According to the theory of continuous reaction model, the larger the ratio of the first to the second reaction rate constant, the greater peak of relative concentration of thermal bitumen can be obtained which is the intermediate product. After reaching the peak relative concentration of thermal bitumen, the oil shale pyrolysis enters the main oil production stage. The pyrolysis specific rate increases with the heating temperature, and the pyrolysis specific rate is higher and the pyrolysis reaction time is shorter under transition metal salt assisted steam heating.