Abstract
A six-lump kinetic model was developed to predict the yields of the target products i-paraffin and aromatics in the FCC gasoline hydro-upgrading process aiming at olefin reduction and octane preservation. The experimental data obtained in a fixed bed reactor were used to estimate the eight kinetic constants and the corresponding activation energies in the model using the Marquardt algorithm. The model testing results revealed that the model predictions were in good agreement with the experimental results, indicating the excellent reliability of the model. Furthermore, the model could be extended to different feedstocks and wide operating conditions. The optimal operating conditions for producing Euro IV clean gasoline with the desired olefin and aromatics contents were determined on the basis of the predicted product yields and verified by the experimental results.
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Abbreviations
- a i :
-
Concentration of lump i (mol g −1gas )
- k i :
-
Reaction rate constant of lump i (h−1)
- k j :
-
Reaction rate constant of lump j (h−1)
- k ji :
-
Rate constant for the reaction of lump j to lump i (h−1)
- \( \overline{M} \) :
-
Average molecular weight of the gas mixture (g mol−1)
- M i :
-
Molecular weight of lump i (g mol−1)
- P :
-
Reaction pressure (Pa)
- R :
-
Gas constant, 8.314 J/(mol· K)
- R HO :
-
Hydrogen-to-oil weight ratio
- S w :
-
Space velocity (h−1)
- T :
-
Reaction temperature (K)
- X :
-
Dimensionless reactor length
- y i :
-
Yield of lump i (wt%)
- y c i :
-
Calculated yield of lump i (wt%)
- y e i :
-
Experimental yield of lump i (wt%)
- Z :
-
Compressibility factor of the gas mixture
- ν ji :
-
Stoichiometric coefficient for the reaction of lump j to lump i
- ρ :
-
Gas density (g/cm3)
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Acknowledgments
This work was supported by the National Basic Research Program of China (Grant No. 2004CB217807), the Natural Science Foundation of China (Grant No. 20606037 and Grant No. 20825621), and the Science and Technology New Star Plan of Beijing (Grant No. 2007B073).
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Fan, Y., Yin, J., Shi, G. et al. A Six-Lump Kinetic Model for Olefin Hydrogenation, Hydroisomerization and Aromatization in FCC Gasoline Hydro-Upgrading. Catal Lett 129, 181–188 (2009). https://doi.org/10.1007/s10562-008-9788-7
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DOI: https://doi.org/10.1007/s10562-008-9788-7