Measurement of activity coefficients, mass-transfer coefficients and diffusion coefficients in multicomponent liquid mixtures by reversed-flow gas chromatography

1989 ◽  
Vol 85 (6) ◽  
pp. 1357 ◽  
Author(s):  
Pericles Agathonos ◽  
George Karaiskakis
Keyword(s):  
Mass Transfer ◽  
Gas Chromatography ◽  
Activity Coefficients ◽  
Diffusion Coefficients ◽  
Liquid Mixtures ◽  
Transfer Coefficients ◽  
Reversed Flow ◽  
Mass Transfer Coefficients ◽  
Multicomponent Liquid Mixtures ◽  
And Diffusion

scholarly journals Determination of Diffusion Coefficients of Selected Long Chain Hydrocarbons using Reversed- Flow Gas Chromatographic Technique

2011 ◽  
Vol 8 (4) ◽  
pp. 1916-1924 ◽  
Author(s):  
Khalisanni Khalid ◽  
Rashid Atta Khan ◽  
Sharifuddin Mohd Zain
Keyword(s):  
Gas Chromatography ◽  
Diffusion Coefficients ◽  
Elution Curve ◽  
Mathematical Expression ◽  
Chromatographic Technique ◽  
Reversed Flow ◽  
Future Studies ◽  
And Diffusion ◽  
Long Chain

The reversed-flow gas chromatography (RF-GC) technique was used to study the evaporation rate and estimating the diffusion coefficient of samples. The RF-GC system comprises of six-port valve, sampling and diffusion column, detector and modified commercial gas chromatography machine. Selected long chain of hydrocarbons (99.99% purity) was used as samples. The solute (stationary phase) were carried out by carrier gas (mobile phase) to the detector. The data obtained from the RF-GC analysis were analysed by deriving the elution curve of the sample peaks using mathematical expression to find the diffusion coefficients values of respective liquids. The values obtained were compared with theoretical values to ensure the accuracy of readings. The interesting findings of the research showed the theoretical values of equilibrium at liquid-gas interphase lead to profound an agreement with the experimental evidence, which contributes for the references of future studies.

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