Experimental determination and thermodynamic modeling of solid-liquid equilibrium of binary systems containing representative compounds of biodiesel and fossil fuels: Ethyl esters and n-dodecane

Author(s)

Branco Almeida Bessa, Larissa Castello ^[1] ; Robustillo, Maria Dolores ^[1] ; Marques, Bianca Cristine ^{[1, 2]} ; Tadini, Carmen Cecilia ^{[1, 2]} ; Pessoa Filho, Pedro de Alcantara ^{[1, 2]}

Affiliation

^[1] Univ Sao Paulo, Engn Sch, Dept Chem Engn, Caixa Postal 61548, BR-05424970 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, FoRC, NAPAN Food Res Ctr, Sao Paulo - Brazil

• Document type: Journal article
• Source: FUEL; v. 237, p. 1132-1140, FEB 1 2019.
• Web of Science Citations: 1

Abstract

Despite recent advances on biodiesel production, its behavior at low temperatures does not favor its use in aviation engines. A better understanding of the solid-liquid phase behavior of systems comprising fatty esters and components of conventional jet fuel is therefore necessary to investigate the possibility of this use of biodiesel. To extend the knowledge on these systems, this work evaluated the solid-liquid equilibrium of binary mixtures containing ethyl esters and a jet fuel constituent (n-dodecane) through differential scanning calorimetry. Experimental results confirmed the occurrence of polymorphism for all pure components in solid phase. A simple eutectic behavior was observed for the binary systems containing n-dodecane and either ethyl myristate or ethyl oleate. However, the pairs composed by the n-dodecane and ethyl stearate, ethyl palmitate or ethyl laurate presented different phase transitions and regions of partial miscibility. The thermodynamic modeling of this equilibrium was carried out using different liquid-phase activity coefficient models, viz. Flory-Huggins, UNIFAC-Dortmund and the ideal solution model. (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: 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
• 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