Bhomia, Ruchir, Trivedi, Vivek ORCID: 0000-0001-9304-9214 and Mitchell, John ORCID: 0000-0003-2945-3292 (2014) A study on melting point depression of fatty acids and Pluronics® in liquid or supercritical carbon dioxide. In: 14th European Meeting on Supercritical Fluids (EMSF) 2014, 18-21 May 2014, Marseille, France.

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Abstract

The melting behaviour of saturated fatty acids and Pluronics® was investigated in liquid or supercritical carbon dioxide (SCCO2). Fatty acids included in this study were lauric acid, myristic acid, palmitic acid and stearic acid while Pluronics® used were F-77, F-127, F-68, F-38 and F-108. The melting point of fatty acids and Pluronics® was determined at pressure values from (7.0 to 50.0) MPa and (8.0 to 50) MPa respectively. Unprocessed and CO2-processed samples of all fatty acids and Pluronics® were analysed by differential scanning calorimetry (DSC) and powder X-ray diffraction (XRD). A melting point depression in the range of (18.1 to 19.3) °C was observed for the Pluronics® whereas the fatty acids showed a depression of (10.8 to 19.5) °C in their melting point. Interestingly, in case of fatty acids, the depression in melting point was found to be inversely proportional to the carbon chain length i.e. smaller the chain length, larger the depression.

Item Type:	Conference or Conference Paper (Speech)
Uncontrolled Keywords:	Supercritical CO2, Melting point depression, Pluronics, Fatty acids
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Science (SCI)
Related URLs:	Publisher
Last Modified:	17 Oct 2016 09:13
URI:	http://gala.gre.ac.uk/id/eprint/13413

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