Commenced in January 2007
Paper Count: 31097
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.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333296Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1569
 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.
 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.
 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.
 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.
 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.
 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.
 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.