Binary and ternary mixtures of liquid crystals with CO2. Issue 9 (September 2015)

• Record Type: Journal Article
• Authors: de Groen, M.; Vlugt, T. J. H.; de Loos, T. W.
• Is Part Of: AIChE journal. Volume 61:Issue 9(2015:Sep.)
• Page Start: 2977
• Page End: 2984
• Publication Date: 2015-09
• Subjects: Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.14857
• Languages: English
• ISSNs: 0001-1541

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Liquid crystals, elongated molecules with a structured liquid phase, may be used as new solvents for CO₂ capture. However, no molecule has been found yet with optimal properties. Therefore, mixtures of two liquid crystals and CO₂ 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 + CO₂ and 4, 4′‐propylcyclohexylbenzonitrile + 4, 4′‐heptylcyclohexylbenzonitrile + CO₂, the nematic phases form a nematic homogeneous solution and the solid phases form an eutectic system, leading to a material with improved properties for CO₂ capture. Moreover, the ternary mixture of 4, 4′‐propylcyclohexylbenzonitrile + 4, 4′‐heptylcyclohexylbenzonitrile + CO₂ showed an increased solubility of CO₂ compared with the binary subsystems. © 2015 American Institute of Chemical Engineers <italic>AIChE J</italic>, 61: 2977–2984, 2015</p> </abstract>