Influence of Heating Rates on Kinetic Parameters of Hydrocarbon Generation from Organic Matter
Abstract: Open system pyrolysis experiments with multiple heating rates (10˚C/min, 20˚C/min, 30˚C/min, 40˚C/min, 50˚C/min) of different types of organic matter samples have been accomplished. The kinetic model parameters can be calibrated by using the experimental data of different heating rates (10˚C/min-20˚C/min-30˚C/min, 20˚C/min-30˚C/min- 40˚C/min, 30˚C/min-40˚C/min-50˚C/min). Results show that the hydrocarbon processes of different types of organic matter can all be described by the parallel first-order rate model. Therein, the activation energy distribution range of type I organic matter is relatively narrow, distributed mainly in the major part of the activation energy. The activation energy distribution range of type III organic matter is relatively wide. The pre-exponential factor obtained by the experimental data, as well as the average activation energy, gradually decreased from slow heating rate combinations to fast heating rate combinations. Extrapolated by geological heating rate of 3.3˚C/Ma shows that with the heating rate increasing, the geological Tmax calculated by the kinetic model gradually decreases from 30˚C - 40˚C. Therefore, proposing a method using the source rock hydrocarbon data or maturity data of the study area to test the reliability of different kinetic parameters could contribute to select the appropriate kinetic parameters. It can also be used for further sensitivity analysis of the kinetic parameters and risk assessment of the kinetic model.
文章引用: 王 民 , 孙业峰 , 卢双舫 , 陈国辉 , 董 奇 , 王雪飞 , 颜鑫桐 , 李 洋 , 王文广 (2013) 热解升温速率对有机质生烃动力学参数的影响。 地球科学前沿， 3， 1-7. doi: 10.12677/AG.2013.31001
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