Estimating the Absorption of Volatile Organic Compounds in Four Biodiesels Using the UNIFAC Procedure
This work considered the thermodynamic feasibility
of scrubbing volatile organic compounds into biodiesel in view of
designing a gas treatment process with this absorbent. A detailed
vapour – liquid equilibrium investigation was performed using the
original UNIFAC group contribution method. The four biodiesels
studied in this work are methyl oleate, methyl palmitate, methyl
linolenate and ethyl stearate. The original UNIFAC procedure was
used to estimate the infinite dilution activity coefficients of 13
selected volatile organic compounds in the biodiesels. The
calculations were done at the VOC mole fraction of 9.213x10-8. Ethyl
stearate gave the most favourable phase equilibrium. A close
agreement was found between the infinite dilution activity coefficient
of toluene found in this work and those reported in literature.
Thermodynamic models can efficiently be used to calculate vast
amount of phase equilibrium behaviour using limited number of
experimental data.
[1] A. Fredenslund, R. L. Jones, and J. M. Prausnitz, "Group contribution
estimation of activity coefficients in non ideal liquid mixtures," AIChE
J., vol. 21, no. 6, pp. 1086 -1099, November 1975.
[2] A. Fredenslund, J. Gmehling, M. L. Michelsen., P. Rasmussen, and J. M.
Prausnitz, "Computerized Design of Multicomponent Distillaion
Column Using the UNIFAC Group Contribution Method for the
Calculation of Activity Coefficients," Ind. Eng. Chem. Process. Des.
Dev., vol. 16, no. 4, pp. 450-462, 1977.
[3] D. S. Abrams and J. M. Prausnitz, "Statistical thermodynamics of liquid
mixtures: A new expression for the excess Gibbs energy of partly and
completely miscible systems," AIChE. J. vol. 21, no. 1, pp. 116 - 128,
1975.
[4] E. Muzenda, M. Belaid, M. Mollagee, F. Ntuli, K. Jalama and J. Kabuba
"Phase equilibrium of volatile organic compounds in very dilute aqueous
and polymeric systems using the UNIFAC Model," in Proc. The 3rd
Technology and Innovation for Sustainable Development International
Conference, ISBN 978 - 616 - 7183 - 55 - 8, March 2010.
[5] E. Muzenda, M. Belaid, M. Mollagee, F. Ntuli and K. Jalama,
"Computerized feasibility studies and design of absorption systems
using the UNIFAC group contribution method for activity coefficients
calculation," in Proc. The 3rd Technology and Innovation for Sustainable
Development International Conference, ISBN 978 - 616 - 7183 - 55 - 8,
March 2010.
[6] E. Muzenda, "Phase equilibrium of Volatile Organic Compounds in
Polymeric Solvents Using Group Contribution Methods" International
Conference on Chemistry and Chemical Engineering, Amsterdam,
Netherlands, September 28-30, 2010; In Proc. World Academy of
Science, Engineering and Technology, vol. 70, Part VI, pp. 765 - 771,
ISSN 1307-6892, September 2010.
[7] C. M. Mateescu, E. Muzenda, M. Belaid, S. Abdulkareem and A. S.
Afolabi "Phase equilibrium prediction at infinite dilution for volatile
organic compounds and Polydimethylsiloxane systems using the
UNIFAC group contribution models," International Conference on
Biological and Environmental Engineering, Penang, Malaysia,
February 23 - 25, 2011, Unpublished.
[1] A. Fredenslund, R. L. Jones, and J. M. Prausnitz, "Group contribution
estimation of activity coefficients in non ideal liquid mixtures," AIChE
J., vol. 21, no. 6, pp. 1086 -1099, November 1975.
[2] A. Fredenslund, J. Gmehling, M. L. Michelsen., P. Rasmussen, and J. M.
Prausnitz, "Computerized Design of Multicomponent Distillaion
Column Using the UNIFAC Group Contribution Method for the
Calculation of Activity Coefficients," Ind. Eng. Chem. Process. Des.
Dev., vol. 16, no. 4, pp. 450-462, 1977.
[3] D. S. Abrams and J. M. Prausnitz, "Statistical thermodynamics of liquid
mixtures: A new expression for the excess Gibbs energy of partly and
completely miscible systems," AIChE. J. vol. 21, no. 1, pp. 116 - 128,
1975.
[4] E. Muzenda, M. Belaid, M. Mollagee, F. Ntuli, K. Jalama and J. Kabuba
"Phase equilibrium of volatile organic compounds in very dilute aqueous
and polymeric systems using the UNIFAC Model," in Proc. The 3rd
Technology and Innovation for Sustainable Development International
Conference, ISBN 978 - 616 - 7183 - 55 - 8, March 2010.
[5] E. Muzenda, M. Belaid, M. Mollagee, F. Ntuli and K. Jalama,
"Computerized feasibility studies and design of absorption systems
using the UNIFAC group contribution method for activity coefficients
calculation," in Proc. The 3rd Technology and Innovation for Sustainable
Development International Conference, ISBN 978 - 616 - 7183 - 55 - 8,
March 2010.
[6] E. Muzenda, "Phase equilibrium of Volatile Organic Compounds in
Polymeric Solvents Using Group Contribution Methods" International
Conference on Chemistry and Chemical Engineering, Amsterdam,
Netherlands, September 28-30, 2010; In Proc. World Academy of
Science, Engineering and Technology, vol. 70, Part VI, pp. 765 - 771,
ISSN 1307-6892, September 2010.
[7] C. M. Mateescu, E. Muzenda, M. Belaid, S. Abdulkareem and A. S.
Afolabi "Phase equilibrium prediction at infinite dilution for volatile
organic compounds and Polydimethylsiloxane systems using the
UNIFAC group contribution models," International Conference on
Biological and Environmental Engineering, Penang, Malaysia,
February 23 - 25, 2011, Unpublished.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:56242", author = "Corina M Mateescu and Edison Muzenda and Mohamed Belaid and Saka Abdulkareem and Ayo S Afolabi", title = "Estimating the Absorption of Volatile Organic Compounds in Four Biodiesels Using the UNIFAC Procedure", abstract = "This work considered the thermodynamic feasibility
of scrubbing volatile organic compounds into biodiesel in view of
designing a gas treatment process with this absorbent. A detailed
vapour – liquid equilibrium investigation was performed using the
original UNIFAC group contribution method. The four biodiesels
studied in this work are methyl oleate, methyl palmitate, methyl
linolenate and ethyl stearate. The original UNIFAC procedure was
used to estimate the infinite dilution activity coefficients of 13
selected volatile organic compounds in the biodiesels. The
calculations were done at the VOC mole fraction of 9.213x10-8. Ethyl
stearate gave the most favourable phase equilibrium. A close
agreement was found between the infinite dilution activity coefficient
of toluene found in this work and those reported in literature.
Thermodynamic models can efficiently be used to calculate vast
amount of phase equilibrium behaviour using limited number of
experimental data.", keywords = "Biodiesel, Equilibrium, Gas treatment, Infinitedilution, Thermodynamic", volume = "5", number = "2", pages = "166-6", }