Influence of Additives (Isoamyl Laurate or Isoamyl Nonanoate) in the Solid-Liquid Equilibrium of Fatty Acid Ethyl Esters

Author(s)

Branco Almeida Bessa, Larissa Castello ; Robustillo, Maria Dolores ; da Silva, Erica Gonna ; Tadini, Carmen Cecilia ; de Almeida Meirelles, Antonio Jose ; Pessoa Filho, Pedro de Alcantara

• Document type: Journal article
• Source: JOURNAL OF CHEMICAL AND ENGINEERING DATA; v. 64, n. 5, p. 13-pg., 2019-05-01.

Abstract

Solid liquid equilibrium data of binary mixtures of fatty acid ethyl esters present in biodiesel, namely, ethyl laurate, ethyl palmitate, ethyl myristate, ethyl stearate, and ethyl oleate, and fatty esters of branched-chain alcohols used as additives (isoamyl laurate and isoamyl nonanoate) were obtained through differential scanning calorimetry. Most of these systems presented eutectic behavior, except for the system system ethyl laurate + isoamyl laurate, which presented peritectic transition. Equilibrium data were thermodynamically modeled either using two different liquid-phase activity coefficient models or considering that the liquid phase is an ideal mixture. Best correlations were observed for the Flory-Huggins equation, but good agreement between calculated and experimental data was also obtained when using both the ideal and UNIFAC-Dortmund models. (AU)

• FAPESP's process: 16/08566-1 - Phase equilibrium thermodynamics for the improvement of physical properties of food bioproducts and their prediction in industrial and digestive processes
• Grantee: Guilherme José Maximo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/06956-2 - Solid-liquid equilibrium and flash point of mixtures of ethyl esters/biodiesel and representative compounds of jet fuel
• Grantee: Larissa Castello Branco Almeida Bessa
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts
• Grantee: Antonio José de Almeida Meirelles
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/07914-8 - FoRC - Food Research Center
• Grantee: Bernadette Dora Gombossy de Melo Franco
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 10/18355-1 - STUDY OF SOLID-LIQUID EQUILIBRIUM IN MIXTURES OF ETHYL ESTERS
• Grantee: Maria Dolores Robustillo Fuentes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral