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Phase Equilibrium Measurements of Sacha Inchi Oil ( Plukenetia volubilis ) and CO 2 at High Pressures
Author(s) -
Prado Ivor M.,
Giufrida Willyan M.,
Alvarez Víctor H.,
Cabral Vladimir F.,
QuispeCondori Sócrates,
Saldaña Marleny D. A.,
CardozoFilho Lucio
Publication year - 2011
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-011-1786-z
Subject(s) - chemistry , mole fraction , omega , phase (matter) , equation of state , volume (thermodynamics) , vapor phase , analytical chemistry (journal) , thermodynamics , chromatography , physics , organic chemistry , quantum mechanics
New data on phase equilibria for Sacha inchi seed oil in carbon dioxide have been measured using a variable volume cell phase equilibria system at temperatures of 303, 313 and 323 K and at pressures ranging from 4.3 to 27.7 MPa. The CO 2 mole fraction varied from 0.7488 to 0.9997. At the studied concentrations, phase transitions of vapor‐liquid, liquid‐liquid‐vapor and liquid‐liquid were observed. Sacha inchi oil contains 47% of omega‐3 fatty acids, with a ratio of 0.76:1 for omega‐6:omega‐3, which is good for human health. The Peng‐Robinson equation of state was used to describe the experimental data. A qualitative agreement was obtained between experimental and calculated data for the binary system CO 2 and Sacha inchi seed oil.