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Binary and ternary mixtures of liquid crystals with CO 2
Author(s) -
de Groen M.,
Vlugt T. J. H.,
de Loos T. W.
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14857
Subject(s) - ternary operation , liquid crystal , eutectic system , solubility , molecule , homogeneous , phase (matter) , ternary numeral system , binary number , chemistry , thermodynamics , crystallography , materials science , organic chemistry , microstructure , physics , optoelectronics , arithmetic , mathematics , computer science , programming language
Liquid crystals, elongated molecules with a structured liquid phase, may be used as new solvents for CO 2 capture. However, no molecule has been found yet with optimal properties. Therefore, mixtures of two liquid crystals and CO 2 are investigated. Also, the phase behavior of some binary subsystems of the investigated ternary systems is studied for comparison. In the mixtures investigated, 4,4′‐pentyloxycyanobiphenyl + 4,4′‐heptyloxycyanobiphenyl + CO 2 and 4,4′‐propylcyclohexylbenzonitrile + 4,4′‐heptylcyclohexylbenzonitrile + CO 2 , the nematic phases form a nematic homogeneous solution and the solid phases form an eutectic system, leading to a material with improved properties for CO 2 capture. Moreover, the ternary mixture of 4,4′‐propylcyclohexylbenzonitrile + 4,4′‐heptylcyclohexylbenzonitrile + CO 2 showed an increased solubility of CO 2 compared with the binary subsystems. © 2015 American Institute of Chemical Engineers AIChE J , 61: 2977–2984, 2015