| Based on the characteristics of FCC diesel and its percentage in the diesel fraction of our country, the study of FCC diesel hydrogenation technology have taken more attentions in recent years. Based on its original liquid phase hydrogenation technology, Sinopec Changling petrochemical company puts forward the new technology of FCC diesel liquid phase hydrogenation using pipe reactor. This paper was to study the kinetic of the new process in order to provide the reference for the implementation of the new process.Firstly, established 6 lumps of lumped kinetic modeling of FCC diesel liquid phase hydrogenation process using pipe reactor, based on the mechanism of diesel oil hydrogenation reaction, and the reaction rate equations of power function type. Its characteristic was to make hydrogen lumped, and increased a reaction equation of hydrogen concentration as the new hydrogenation process no hydrogen circulation process. Then obtained 30 model parameters by L-M algorithm with the experimental datas of FCC diesel liquid phase hydrogenation using single pipe reactor. The model was preliminary validated using the else experimental data, and then under different reaction conditions, the prediction results of the hydrogenation reaction were calculated. Through the analysis of the discussion on the calculation results, it shows that the model is reliable.Finally, the simulation results of the multi-points adding hydrogen process, which are the innovation points of the new liquid phase hydrogenation technology, was calculated through the model in this paper. The results show that increased the amounts of adding hydrogen or increased the number of adding hydrogen points, both can improve the results of the reaction; and when the number of adding hydrogen points wasn’t change, increased the amounts of adding hydrogen had a better results. The above research results can provide the reference to the development of the new liquid phase hydrogenation technology for FCC diesel in pipe reactor. |
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