New Multi-Solid Thermodynamic Model for the Prediction of Wax Formation
In the previous multi-solid models,¤ò approach is
used for the calculation of fugacity in the liquid phase. For the first
time, in the proposed multi-solid thermodynamic model,γ approach
has been used for calculation of fugacity in the liquid mixture.
Therefore, some activity coefficient models have been studied that
the results show that the predictive Wilson model is more appropriate
than others. The results demonstrate γ approach using the predictive
Wilson model is in more agreement with experimental data than the
previous multi-solid models. Also, by this method, generates a new
approach for presenting stability analysis in phase equilibrium
calculations. Meanwhile, the run time in γ approach is less than the
previous methods used ¤ò approach. The results of the new model
present 0.75 AAD % (Average Absolute Deviation) from the
experimental data which is less than the results error of the previous
multi-solid models obviously.
[1] C. Lira-Galena, A. Firoozabadi and J.M Prausnitz, "Thermodynamic of wax precipitation in petroleum mixtures," AIChE J., vol. 42, pp. 239-
248, 1996.
[2] D.V. Nichita, L. Goual and A. Firoozabadi, "Wax precipitation in gas
condensate mixtures," SPE Prod. Facil., vol. 16, pp. 250-259, 2001.
[3] K.S. Pedersen, P. Skovborg and H.P. Ronningsen, "Wax precipitation
from north sea crude oils 4. Thermodynamic modeling," Energy and
Fuels, vol. 5, pp. 924-932, 1991.
[4] D.Y. Peng and D.B. Robinson, "A new two-constant equation of state,"
Ind. Eng. Chem. Fund., vol. 15, pp. 59-64, 1976.
[5] A. Danesh, PVT and Phase Behavior of Petroleum Reservoir Fluids, 3rd
impression, Elsevier, Netherlands, 2003.
[6] K.W. Won, "Thermodynamics for solid solution-liquid-vapor equilibria:
wax phase formation from heavy hydrocarbon mixtures," Fluid Phase
Equilib., vol. 30, pp. 265-279, 1986.
[7] J.M. Prausnitz, R.N. Lichtenthaler and E.G. de Azevedo, Molecular
Thermodynamics of Fluid-Phase Equilibria, Prentice-Hall, Englewood
Cliffs, NJ, 1999.
[8] B.L. Larsen, P. Rasmussen and A. Fredenslund, "A modified UNIFAC
group-contribution model for prediction of phase equilibria and heats of
mixing," Ind. Eng. Chem. Res., vol. 26, pp. 2274-2286, 1987.
[9] F. Esmaeilzadeh, J. Fathi Kaljahi and E. Ghanaei, "Investigation of
different activity coefficient models in thermodynamic modeling of wax
precipitation," Fluid Phase Equilib., vol. 248, pp. 7-18, 2006.
[10] E. Ghanaei, "Thermodynamic modeling of wax precipitation through gas
condensate pipelines," M.S. thesis, Chem. and Pet. Eng. Dept., Shiraz
Univ., Shiraz, Iran, 2006.
[11] J.A.P. Coutinho, "Predictive UNIQUAC: A new model for the
description of multiphase solid-liquid equilibria in complex hydrocarbon
mixtures," Ind. Eng. Chem. Res., vol. 37, pp. 4870-4875, 1998.
[12] J.A.P. Coutinho, "Predictive local composition models: NRTL and
UNIQUAC and their application to model solid-liquid equilibrium of nalkane,"
Fluid Phase Equilib., vol. 158-160, pp. 447-457, 1999.
[13] J.A.P. Coutinho, C. Dauphin, J.L. Daridon, "Measurements and
modelling of wax formation in diesel fuels," Fuel, vol. 79, pp. 607-616,
2000.
[14] J.A.P. Coutinho, E.H. Stenby, "Predictive local composition models for
solid/liquid equilibrium in n-alkane systems: Wilson equation for
multicomponent systems," Ind. Eng. Chem. Res., vol. 35, pp. 918-925,
1996.
[15] V. Metivaud, F. Rajabalee, H.A.J. Oonk, D. Mondieig, Y. Haget,
"Complete determination of the solid (RI)-liquid equilibria of four
consecutive n-alkane ternary systems in the range C14H30-C21H44 using
only binary data," Can. J. Chem., vol. 77, pp.332-339, 1999.
[16] A. Firoozabadi, Thermodynamics of Hydrocarbon Reservoirs, 1st
edition, McGraw-Hill, New York City, 1999.
[17] D.L. Morgan, R. Kobayashi, "Extension of Pitzer CSP models for vapor
pressures and heats of vaporization to long-chain hydrocarbons," Fluid
Phase Equilib., vol. 94, pp. 51-87, 1994.
[18] C.H. Twu, "An internally consistent correlation for predicting the critical
properties and molecular weights of petroleum and coal-tar liquids,"
Fluid Phase Equilib., vol. 16, pp. 137-150, 1984.
[1] C. Lira-Galena, A. Firoozabadi and J.M Prausnitz, "Thermodynamic of wax precipitation in petroleum mixtures," AIChE J., vol. 42, pp. 239-
248, 1996.
[2] D.V. Nichita, L. Goual and A. Firoozabadi, "Wax precipitation in gas
condensate mixtures," SPE Prod. Facil., vol. 16, pp. 250-259, 2001.
[3] K.S. Pedersen, P. Skovborg and H.P. Ronningsen, "Wax precipitation
from north sea crude oils 4. Thermodynamic modeling," Energy and
Fuels, vol. 5, pp. 924-932, 1991.
[4] D.Y. Peng and D.B. Robinson, "A new two-constant equation of state,"
Ind. Eng. Chem. Fund., vol. 15, pp. 59-64, 1976.
[5] A. Danesh, PVT and Phase Behavior of Petroleum Reservoir Fluids, 3rd
impression, Elsevier, Netherlands, 2003.
[6] K.W. Won, "Thermodynamics for solid solution-liquid-vapor equilibria:
wax phase formation from heavy hydrocarbon mixtures," Fluid Phase
Equilib., vol. 30, pp. 265-279, 1986.
[7] J.M. Prausnitz, R.N. Lichtenthaler and E.G. de Azevedo, Molecular
Thermodynamics of Fluid-Phase Equilibria, Prentice-Hall, Englewood
Cliffs, NJ, 1999.
[8] B.L. Larsen, P. Rasmussen and A. Fredenslund, "A modified UNIFAC
group-contribution model for prediction of phase equilibria and heats of
mixing," Ind. Eng. Chem. Res., vol. 26, pp. 2274-2286, 1987.
[9] F. Esmaeilzadeh, J. Fathi Kaljahi and E. Ghanaei, "Investigation of
different activity coefficient models in thermodynamic modeling of wax
precipitation," Fluid Phase Equilib., vol. 248, pp. 7-18, 2006.
[10] E. Ghanaei, "Thermodynamic modeling of wax precipitation through gas
condensate pipelines," M.S. thesis, Chem. and Pet. Eng. Dept., Shiraz
Univ., Shiraz, Iran, 2006.
[11] J.A.P. Coutinho, "Predictive UNIQUAC: A new model for the
description of multiphase solid-liquid equilibria in complex hydrocarbon
mixtures," Ind. Eng. Chem. Res., vol. 37, pp. 4870-4875, 1998.
[12] J.A.P. Coutinho, "Predictive local composition models: NRTL and
UNIQUAC and their application to model solid-liquid equilibrium of nalkane,"
Fluid Phase Equilib., vol. 158-160, pp. 447-457, 1999.
[13] J.A.P. Coutinho, C. Dauphin, J.L. Daridon, "Measurements and
modelling of wax formation in diesel fuels," Fuel, vol. 79, pp. 607-616,
2000.
[14] J.A.P. Coutinho, E.H. Stenby, "Predictive local composition models for
solid/liquid equilibrium in n-alkane systems: Wilson equation for
multicomponent systems," Ind. Eng. Chem. Res., vol. 35, pp. 918-925,
1996.
[15] V. Metivaud, F. Rajabalee, H.A.J. Oonk, D. Mondieig, Y. Haget,
"Complete determination of the solid (RI)-liquid equilibria of four
consecutive n-alkane ternary systems in the range C14H30-C21H44 using
only binary data," Can. J. Chem., vol. 77, pp.332-339, 1999.
[16] A. Firoozabadi, Thermodynamics of Hydrocarbon Reservoirs, 1st
edition, McGraw-Hill, New York City, 1999.
[17] D.L. Morgan, R. Kobayashi, "Extension of Pitzer CSP models for vapor
pressures and heats of vaporization to long-chain hydrocarbons," Fluid
Phase Equilib., vol. 94, pp. 51-87, 1994.
[18] C.H. Twu, "An internally consistent correlation for predicting the critical
properties and molecular weights of petroleum and coal-tar liquids,"
Fluid Phase Equilib., vol. 16, pp. 137-150, 1984.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:56928", author = "Ehsan Ghanaei and Feridun Esmaeilzadeh and Jamshid Fathi Kaljahi", title = "New Multi-Solid Thermodynamic Model for the Prediction of Wax Formation ", abstract = "In the previous multi-solid models,¤ò approach is
used for the calculation of fugacity in the liquid phase. For the first
time, in the proposed multi-solid thermodynamic model,γ approach
has been used for calculation of fugacity in the liquid mixture.
Therefore, some activity coefficient models have been studied that
the results show that the predictive Wilson model is more appropriate
than others. The results demonstrate γ approach using the predictive
Wilson model is in more agreement with experimental data than the
previous multi-solid models. Also, by this method, generates a new
approach for presenting stability analysis in phase equilibrium
calculations. Meanwhile, the run time in γ approach is less than the
previous methods used ¤ò approach. The results of the new model
present 0.75 AAD % (Average Absolute Deviation) from the
experimental data which is less than the results error of the previous
multi-solid models obviously.", keywords = "Multi-solid thermodynamic model, PredictiveWilson model, Wax formation.", volume = "1", number = "5", pages = "56-6", }
