Densities and P-x-y diagrams for carbon dioxide dissolution in methanol, ethanol, and acetone mixtures

Chang, Chieh-Ming J.; Day, Chany-Yih; Ko, Ching-Ming; Chiu, Kou-Lung

doi:10.1016/s0378-3812(96)03208-6

Cited by 214 publications

(136 citation statements)

References 10 publications

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“…The chemical reaction will therefore take place in the liquid phase. The solubility of CO 2 in methanol has been reported to decrease with increasing temperature and to increase with pressure (Chang et al, 1997). Accordingly, in our study under isothermal conditions an increase in CO 2 pressure will shift the equilibria depicted in Figures 1 and 2 to the carbonated specie thus enhancing the rate of DMC formation, in agreement with the experimental results.…”

Section: Resultssupporting

confidence: 91%

Synthesis of dimethyl carbonate in supercritical carbon dioxide

Ballivet‐Tkatchenko

Ligabue

Plasseraud

2006

Braz. J. Chem. Eng.

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-The reactivity of carbon dioxide with methanol to form dimethyl carbonate was studied in the presence of the n-butylmethoxytin compounds n-Bu 3 SnOCH 3 , n-Bu 2 Sn(OCH 3 ) 2 , and [n-Bu 2 (CH 3 O)Sn] 2 O. The reaction occurred under solventless conditions at 423 K and was produced by an increase in CO 2 pressure. This beneficial effect is primarily attributed to phase behavior. The mass transfer under liquid-vapor biphasic conditions was not limiting when the system reached the supercritical state for a CO 2 pressure higher than 16 MPa. Under these conditions, CO 2 acted as a reactant and a solvent.

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Section: Resultssupporting

confidence: 91%

Synthesis of dimethyl carbonate in supercritical carbon dioxide

Ballivet‐Tkatchenko

Ligabue

Plasseraud

2006

Braz. J. Chem. Eng.

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“…The most deviations in bubble pressure are less than 6%. Several higher deviations (> 10%) appear at temperatures near critical pressure maximum of critical curve (P-T projection) or for experimental data which seem to be unreliable [25,26]. Also, the AADP (%) and AADY (%) are higher for literature data measured only in the critical region.…”

Section: Phase Equilibria Experiments and Calculations For Carbon Diomentioning

confidence: 87%

Phase equilibria experiments and calculations for carbon dioxide + methanol binary system

2009

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Abstract:Vapor-liquid equilibria (VLE) data for the carbon dioxide + methanol system was measured at 293.15, 298.15, 310.15, and 323.15 K. Phase behavior measurements were made in a high-pressure visual cell with variable volume, based on the static-analytic method. The pressure range under investigation was between 4.8 and 95.1 bar. The Soave-Redlich-Kwong (SRK)-EOS coupled with Huron-Vidal (HV) mixing rules and a reduced UNIQUAC model, was used in a semi-predictive approach, in order to represent the phase behavior (critical curve, isothermal VLE) of the system. The topology of the phase behavior of the carbon dioxide + methanol system is satisfactory predicted with the SRK/HV-residual UNIQUAC model. © Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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“…The binary interaction coefficients (k ij ), critical temperature (T c ), pressure (p c ), and the acentric factor (w) for the pure components were taken from the literature (35).…”

Section: Co 2 -Ethanol Phase Behaviourmentioning

confidence: 99%

Supercritical Extraction of Carotenoids from Rosa canina L. Hips and their Formulation with β-Cyclodextrin

et al. 2008

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Abstract. The purpose of this research was to preliminary assess the suitability of a new method for the preparation of a solid formulation in form of powder composed by β-cyclodextrin and the supercritical extract of Rosa canina hips. The method implies the extraction of carotenoids, in particular β-carotene, from freeze dried fruits of R. canina with supercritical CO 2 at 70°C and 300 bar, in the presence of varying quantity of ethanol as entrainer. The obtained supercritical solution is then expanded at ambient conditions into an aqueous solution of β-cyclodextrin to favour the interaction between β-cyclodextrin and the lipophilic components of the extract. β-carotene solubility (mole fraction) in supercritical CO 2 or in supercritical CO 2 /ethanol mixtures were in the order of 1 10 −7 . The β-carotene extracted from R.canina fruits (nearly 10 μg/g of dry matrix), interacts almost quantitatively with β-cyclodextrin affording a solid phase, which presents a low apparent solubility in water. Finally the interaction with β-cyclodextrin results in a higher concentration of the β-carotene trans-form relative to the cis-form in the extracted product when collected in an aqueous solution of β-cyclodextrin with respect to the extract in n-hexane.

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Densities and P-x-y diagrams for carbon dioxide dissolution in methanol, ethanol, and acetone mixtures

Cited by 214 publications

References 10 publications

Synthesis of dimethyl carbonate in supercritical carbon dioxide

Synthesis of dimethyl carbonate in supercritical carbon dioxide

Phase equilibria experiments and calculations for carbon dioxide + methanol binary system

Supercritical Extraction of Carotenoids from Rosa canina L. Hips and their Formulation with β-Cyclodextrin

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