Multiphase equilibrium behavior of the mixture carbon dioxide + ethane + methanol

Hong, Seung Pyo; Patton, Christi L.; Luks, Kraemer D.

doi:10.1021/je00013a024

Cited by 8 publications

(1 citation statement)

References 8 publications

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“…There is limited information in the literature about phase equilibrium of ternary systems involving CO 2 -expanded solvents. ,− We are interested in understanding the role of CO 2 in improving the solubility of important reactant gases in liquids. In this paper, we report the solubility of O 2 and CO in the presence of CO 2 in three different organic solvents, viz., acetonitrile, acetone, and methanol.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Solubility of Oxygen and Carbon Monoxide in CO₂-Expanded Liquids

Lopez-Castillo

Aki

Stadtherr

et al. 2006

Ind. Eng. Chem. Res.

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CO 2 -expanded liquids are attractive solvent mixtures for many reactions since they have the potential to be designed to dissolve liquid and gaseous reactants, as well as catalysts, can have improved mass transfer compared to traditional liquid-phase reactions, can reduce the amount of volatile organics solvent necessary, and can ameliorate safety concerns. Of primary importance in evaluating CO 2 -expanded liquids for reactions involving permanent gases is the solubility of those gases in the liquids in the presence of CO 2 . Here, we report the solubility of O 2 and CO in CO 2 -expanded acetonitrile, acetone, and methanol at temperatures between 25 and 40 °C and pressures to 90 bar. The solubility of O 2 and CO in the CO 2 -expanded liquids is enhanced over the solubility in the absence of CO 2 at the same O 2 or CO fugacity. However, in no case in the mixed gas system did the O 2 or CO solubility substantially exceed what one could achieve with the pure O 2 or pure CO at the same total pressure. Thus, the enhancement of the solubility of O 2 and CO by CO 2 is relatively modest under the conditions investigated. Most importantly, we found that the Peng-Robinson equation of state, using only binary interaction parameters fit to binary data, was quite successful in predicting the phase behavior of the ternary systems.

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