Abstract:

Due to the large difference of pyrolysis performance of n-paraffin,i-paraffin, 5-cyclanes and 6-cyclanes in Daqing heavy naphtha, it may be necessary to modify the 8 lumped component kinetic model. A 10 lumped component kinetic model with 4 stock lumped component is proposed for the pyrolysis of Daqing heavy naphtha.The kinetic parameters in the new model can be determined as follows: using the conception of shallow pyrolysis, the reaction rate constants are estimated by combining lay-method and stepwise-method, including their activation energy and pre-exponential factors.The better agreement between experimental and calculated data shows that this model is of predicting ability with better accuracy in wider range of feedstocks.