Synthesis and Thermophysical Characterization of Fatty Amides for Thermal Energy Storage

Abstract

Nine monoamides were synthesized from carboxylic acids (C8-C18) and crude glycerol. The final monoamides were the result of a rearrangement of the acyl chain during the final hydrogenation process. The purity of the final compounds was determined by spectroscopic and mass spectrometry (MS) techniques. The thermophysical properties of solid monoamides were investigated to determine their capability to act as phase change materials (PCM) in thermal energy storage. Thermophysical properties were determined with a di erential scanning calorimeter (DSC). The melting temperatures of the analyzed material ranged from 62.2 C to 116.4 C. The analyzed enthalpy of these monoamides ranged from 25.8 kJ/kg to 149.7 kJ/kg. Enthalpy values are analyzed considering the carbon chain and the formation of hydrogen bonds.

This work was partially funded by the Ministerio de Ciencia, Innovación y Universidades de España (grants: MINECO/FEDER CTQ2015-70982-C3-1-R and MINECO/FEDER RTI2018-093849-B-C31). This work is partially supported by ICREA under the ICREA Academia programme. Acknowledgments: R.C.-G. and L.F.C. would like to thank the Catalan Government for the quality accreditation given to their research groups (grants 2017 SGR 828 and GREiA 2017 SGR 1537, respectively). DBA and GREiA are certified agent TECNIO in the category of technology developers from the Government of Catalonia.