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Phase Boundaries of CO 2 + Toluene, CO 2 + Acetone, and CO 2 + Ethanol at High Temperatures and High Pressures

2006; American Chemical Society; Volume: 51; Issue: 4 Linguagem: Inglês

10.1021/je060099a

1520-5134

Weize Wu, Jie Ke, Martyn Poliakoff,

Carbon Dioxide Capture Technologies

The phase boundaries of the CO2 + toluene, CO2 + acetone, and CO2 + ethanol binary systems have been measured via a dynamic synthetic method based on a fiber optic reflectometer. We focus on a wide range of concentration of CO2 from 0.2 to 0.9 in mole fraction with temperatures up to 572 K. The results are correlated by the Peng−Robinson equation of state (PR-EOS) with two interaction parameters, which shows that the PR-EOS can predict the phase boundaries of CO2 + toluene and CO2 + acetone well but cannot predict the phase boundaries of the CO2 + ethanol binary system.