Imperial College London
Alternate

Professor Erich A. Muller

Faculty of Engineering, Department of Chemical Engineering

Professor of Thermodynamics
 
 
 
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Contact

 

+44 (0)20 7594 1569e.muller Website

 
 
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Assistant

 

Mrs Raluca Reynolds +44 (0)20 7594 5557

 
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Location

 

409ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{cumicheo:2018:10.1016/j.fuel.2018.04.057,
author = {cumicheo, C and cartes, M and Muller, EA and Mejia, A},
doi = {10.1016/j.fuel.2018.04.057},
journal = {Fuel},
pages = {92--102},
title = {Experimental measurements and theoretical modeling of high-pressure mass densities and interfacial tensions of carbon dioxide + n-heptane + toluene and its carbon dioxide binary systems},
url = {http://dx.doi.org/10.1016/j.fuel.2018.04.057},
volume = {228},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Experimental determination and theoretical predictions of the isothermal (344.15 K) mass densities and interfacial  tensions  for  the  system  carbon  dioxide  (CO2)  with  heptol  (n-heptane  +  toluene)  mixtures varying liquid volume fraction compositions of toluene (0, 25, 50, 75, 100 % v/v) and over the pressure range 0.1 to 8 MPa are reported. Measurements are carried out on a high-pressure device that includes a vibrating tube densimeter and a pendant drop tensiometer. Theoretical modeling of mass densities phase equilibria  and  interfacial  properties  (i.e.,  interfacial  tension  and  interfacial  concentration  profiles)  are performed by employing the Square Gradient Theory using an extension of the Statistical Associating Fluid  Theory  equation  of  state  that  accounts  for  ring  fluids.  The  experimental  bulk  phase  equilibrium densities and interfacial tensions obtained are in very good agreement with the theoretical predictions. Although there are no previous experimental data of these mixtures at the conditions explored herein, the results follow the same trends observed from experimental data at other conditions. The combination of experimental and modeling approaches provides a route to simultaneously predict phase equilibrium and interfacial properties within acceptable statistical deviations. For  the  systems  and  conditions  studied  here,  we  observe  that  the  phase  equilibrium  of  the  mixtures display  zeotropic  vapor-liquid  equilibria  with  positive  deviations  from  ideal  behavior.  The  mass  bulk densities  behave  ordinarily  whereas  the  interfacial  tensions  decrease  as  the  pressure  or  liquid  mole fraction of CO2 increases and/or the ratio toluene/heptane decreases. The interfacial concentration along the interfacial region exhibits a remarkable high excess adsorption of CO2, which increases with pressure and  it  is  larger  in  n-heptane  than  in  toluene.  Toluene  does  not  exhibit  any  special  ads
AU  - cumicheo,C
AU  - cartes,M
AU  - Muller,EA
AU  - Mejia,A
DO  - 10.1016/j.fuel.2018.04.057
EP  - 102
PY  - 2018///
SN  - 0016-2361
SP  - 92
TI  - Experimental measurements and theoretical modeling of high-pressure mass densities and interfacial tensions of carbon dioxide + n-heptane + toluene and its carbon dioxide binary systems
T2  - Fuel
UR  - http://dx.doi.org/10.1016/j.fuel.2018.04.057
UR  - http://hdl.handle.net/10044/1/59017
VL  - 228
ER  -
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