High-pressure phase equilibria for carbon dioxide-methanol-water system: Experimental data and critical evaluation of mixing rules

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00023a061· OSTI ID:5744283

Yoon, Jiho; Chun, Moonkyoon; Hong, Wonhi; Lee, Huen ^[1]

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1. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Chemical Engineering

Equilibrium phase compositions for the carbon dioxide-methanol-water system were measured at 313.2 K and pressures of 70, 100, and 120 bar. Three-phase equilibria for this system were also measured at 305.15, 308.15, and 311.15 K, temperatures and pressures near the critical point of carbon dioxide. The two-and three-phase equilibrium data were correlated with the Soave-Redlich-Kwong and Patel-Teja equations of state incorporated with various types of the local composition and Huron-Vidal mixing rules. The Huron-Vidal mixing rules were found to be superior to the local composition models in predicting two-phase equilibria. Since the pressure range covering the three-phase region was very narrow, the Huron-Vidal mixing rules could not accurately predict the experimental three-phase equilibria. However, if there were a slight change of pressure in phase calculation, the Huron mixing models could correctly predict the experimental three-phase region and equilibrium compositions.

• OSTI ID: 5744283
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 32:11; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

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CHALCOGENIDES
DISPERSIONS
EXTRACTION
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