Non-isothermal separation process using supercritical technology and thermal diffusion

• Grant number: 15/09644-3
• Support type: Regular Research Grants
• Duration: September 01, 2015 - August 31, 2017
• Field of knowledge: Agronomical Sciences - Food Science and Technology - Food Engineering
• Principal researcher: Fernando Antonio Cabral
• Grantee: Fernando Antonio Cabral
• Home Institution: Faculdade de Engenharia de Alimentos (FEA). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

We intend to study the influence of thermal diffusion (Soret effect) in separation processes using supercritical carbon dioxide (scCO2) as a solvent. Two mixtures, one of refined sunflower oil with a commercial oleic acid and one of limonene with linalool, will be taken to represent the model systems in the deacidification of vegetable oils and desterpenation of orange essential oil, respectively. The main objective is to verify if the separation processes in nonisothermal supercritical systems enhance the fractionation when they are compared to supercritical isothermal systems. To assist in the analysis of the results, we intend also thermodynamically modeling the systems using the Peng-Robinson´s equation of state, where the binary interaction parameters between pairs of components of the mixture are obtained by fitting the thermodynamic model to the solubility´s experimental data (isothermal) of oleic acid sunflower oil, linalool and limonene in supercritical carbon dioxide. Nonisothermal data, non-existent in the scientific literature, will be obtained experimentally. To verify if the thermal diffusion in supercritical environment can be a viable alternative, an equilibrium cell to operate under isothermal or nonisothermal conditions will be constructed to experimental measurements. The selectivity of carbon dioxide (CO2) to separate free fatty acids (oleic acid) of triacylglycerols (sunflower oil) and non-oxygenated terpenes (limonene) of oxygenated terpenes (linalool) should be measured and compared to isothermal systems. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GARMUS, TABATA T.; DE OLIVEIRA GIANI, NATASHA AIRES; FILHO, WALTER A. RAMMAZZINA; QUEIROGA, CARMEN L.; CABRAL, FERNANDO A. Solubility of oleic acid, triacylglycerol and their mixtures in supercritical carbon dioxide and thermodynamic modeling of phase equilibrium. JOURNAL OF SUPERCRITICAL FLUIDS, v. 143, p. 275-285, JAN 2019. Web of Science Citations: 1.

DE FREITAS BLANCO, VERONICA SANTANA; MICHALAK, BARBARA; MACCARI ZELIOLI, ICARO AUGUSTO; SANTOS DE OLIVEIRA, ADRIANA DA SILVA; NOVA RODRIGUES, MARILI VILLA; FERREIRA, ANTONIO GILBERTO; GARCIA, VERA LUCIA; CABRAL, FERNANDO ANTONIO; KISS, ANNA KAROLINA; FERREIRA RODRIGUES, RODNEY ALEXANDRE. Isolation of spilanthol from Acmella oleracea based on Green Chemistry and evaluation of its in vitro anti-inflammatory activity. JOURNAL OF SUPERCRITICAL FLUIDS, v. 140, p. 372-379, OCT 2018. Web of Science Citations: 1.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CABRAL, Fernando Antonio. Non-isothermal separation process using supercritical technology and thermal diffusion. 2018. Doctoral Thesis - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos.