Estimating the absorption of volatile organic compounds in four biodiesels using the UNIFAC procedure

Journal article

Authors/Editors

Muzenda, Edison

Research Areas

ENGINEERING AND TECHNOLOGY (Frascati classification)

Publication Details

Subtitle: Estimating the absorption of volatile organic compounds in four biodiesels using the UNIFAC procedure

Author list: Muzenda, Edison

Publisher: World Academy of Science, Engineering and Technology (WASET)

Publication year: 2011

Start page: 1

End page: 6

Number of pages: 6

ISSN: 2010-376X

eISSN: 2010-3778

URL: file:///C:/Users/kethmoloi/Downloads/PDF Document.pdf

Languages: English-United States (EN-US)

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 9.213×10 -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, Infinite dilution, Thermodynamic

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