Articles & Issues
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
PHASE EQUILIBRIA OF HEAVY RAW PYROLYSIS GASOLINE CONTINUOUS MIXTURE USING PENG-ROBINSON EQUATION OF STATE
Korean Journal of Chemical Engineering, April 1992, 9(2), 89-97(9), 10.1007/BF02697533
Download PDF
Abstract
The heavy-RPG(Raw Pyrolysis Gasoline), which is a variable mixture of mainly unsaturated C9 fractions in the cracking of petroleum naphthas, is one of the important feed materials for petroleum resins. To produce the resin with favorable quality, one need to use well purified fraction of the h-RPG and, accordingly, a knowledge of the phase equilibria for the h-RPG is required. The h-RPG, however, is regraded as a typical continuous mixture which contains far too many components for standard chemical analysis. Thus, we present here an efficient method collecting phase equilibrium data for such a mixture based the method of continuous thermodynamics and the Peng-Robinson equation of state. First, through the gas chromatographic analysis and the ASTM D86 experiment for a typical h-RPG mixture, we identified the total number of 43 constituents and found the distribution of TBPs. Then, the continuous fraction of h-RPG mixture is characterized by gamma function where the TBP index is used as the distribution variable. Finally, we performed bubble and dew point, and flash calculations by the quadrature method to the continuous fraction. The results are compared with those calculated by the pseudo-component methods. We found that the method presented here can be used for the reliable phase equilibrium calculation of such a continuous mixture while significantly reduce the computation time with more favorable accuracy over the conventional pseudocomponent method.
References
Kamide K, Batch Fractionation, in Fractionation of Synthetic Polymers, edited by Tung, L.H., Marcel Dekker Inc., Ch. 2, p. 103 (1977)
Hayashi H, Org. Synth. Chem., 36(6), 533 (1978)
Cotterman RL, Bender R, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 194 (1985)
Cotterman RL, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 433 (1985)
Ratzsch MT, Kehlen H, Fluid Phase Equilib., 14, 225 (1983)
Willman BT, Teja AS, AIChE J., 32, 2067 (1986)
Kim S, Rho HK, Kim HS, HWAHAK KONGHAK, 29(6), 654 (1991)
American Petroleum Institute Technical Data Book-Petroleum Refining, Washington, U.S.A. (1980)
Fussel DD, Yanosik JL, Soc. Pet. Eng. J., 18, 174 (1978)
Reid RC, Prausnitz JM, Poling BE, The Properties of Gases and Liquids, 4th Eds., McGraw-Hill, New York, U.S.A. (1988)
Twu CH, Fluid Phase Equilib., 16, 137 (1984)
Hayashi H, Org. Synth. Chem., 36(6), 533 (1978)
Cotterman RL, Bender R, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 194 (1985)
Cotterman RL, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 433 (1985)
Ratzsch MT, Kehlen H, Fluid Phase Equilib., 14, 225 (1983)
Willman BT, Teja AS, AIChE J., 32, 2067 (1986)
Kim S, Rho HK, Kim HS, HWAHAK KONGHAK, 29(6), 654 (1991)
American Petroleum Institute Technical Data Book-Petroleum Refining, Washington, U.S.A. (1980)
Fussel DD, Yanosik JL, Soc. Pet. Eng. J., 18, 174 (1978)
Reid RC, Prausnitz JM, Poling BE, The Properties of Gases and Liquids, 4th Eds., McGraw-Hill, New York, U.S.A. (1988)
Twu CH, Fluid Phase Equilib., 16, 137 (1984)
