Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent
In the study the yield and kinetic and thermodynamic parameters of the oil extraction process from Jatropha curcas L. using ethanol as a solvent were evaluated for different temperatures, moisture contents of the solid phase, and particle sizes. The extraction process yield increased with contact ti...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | International Journal of Chemical Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/871236 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832560818766479360 |
|---|---|
| author | Silmara Bispo dos Santos Marcio Arêdes Martins Ana Lívia Caneschi Paulo Rafael Morette Aguilar Jane Sélia dos Reis Coimbra |
| author_facet | Silmara Bispo dos Santos Marcio Arêdes Martins Ana Lívia Caneschi Paulo Rafael Morette Aguilar Jane Sélia dos Reis Coimbra |
| author_sort | Silmara Bispo dos Santos |
| collection | DOAJ |
| description | In the study the yield and kinetic and thermodynamic parameters of the oil extraction process from Jatropha curcas L. using ethanol as a solvent were evaluated for different temperatures, moisture contents of the solid phase, and particle sizes. The extraction process yield increased with contact time of solid particles with the solvent until reaching equilibrium (saturation of the solvent), for all the temperatures, moisture contents, and average particle sizes. These parameters significantly influenced (95% confidence) the extracted oil yield. A convective mass transfer model was used to simulate the extraction process and estimate the kinetic and thermodynamic parameters. For all conditions evaluated, values of oil yield in the liquid phase close to equilibrium were obtained in approximately 20 min. The variations of enthalpy and entropy were positive, indicating that the process is endothermic and irreversible. Values obtained for the variation in Gibbs free energy showed that the extraction process using ethanol as a solvent is spontaneous and thermodynamically favorable for the moisture content of 0%, where the smaller the average particle size the greater the spontaneity of the process. |
| format | Article |
| id | doaj-art-945779b03bbb44d5bc647e83a407c96e |
| institution | Kabale University |
| issn | 1687-806X 1687-8078 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Chemical Engineering |
| spelling | doaj-art-945779b03bbb44d5bc647e83a407c96e2025-02-03T01:26:43ZengWileyInternational Journal of Chemical Engineering1687-806X1687-80782015-01-01201510.1155/2015/871236871236Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a SolventSilmara Bispo dos Santos0Marcio Arêdes Martins1Ana Lívia Caneschi2Paulo Rafael Morette Aguilar3Jane Sélia dos Reis Coimbra4Mechanical Engineering Department, Universidade Federal de Mato Grosso (UFMT), Rodovia MT-270, Km 06, s/n, Campus Rondonópolis, 78735-901 Rondonópolis, MT, BrazilAgricultural Engineering Department, Universidade Federal de Viçosa (UFV), Avenida Peter Henry Rolfs, s/n, Campus Viçosa, 36570-000 Viçosa, MG, BrazilChemical Engineering, LafargeHolcim, Rodovia MG 170, s/n, Km 4, 35588-000 Arcos, MG, BrazilAgricultural and Ambiental Engineering, Bram Offshore, Rua da Quitanda, 86/Sala 401, Centro, 20091-005 Rio de Janeiro, RJ, BrazilFood Technology Department, Universidade Federal de Viçosa (UFV), Avenida Peter Henry Rolfs, s/n, Campus Viçosa, 36570-000 Viçosa, MG, BrazilIn the study the yield and kinetic and thermodynamic parameters of the oil extraction process from Jatropha curcas L. using ethanol as a solvent were evaluated for different temperatures, moisture contents of the solid phase, and particle sizes. The extraction process yield increased with contact time of solid particles with the solvent until reaching equilibrium (saturation of the solvent), for all the temperatures, moisture contents, and average particle sizes. These parameters significantly influenced (95% confidence) the extracted oil yield. A convective mass transfer model was used to simulate the extraction process and estimate the kinetic and thermodynamic parameters. For all conditions evaluated, values of oil yield in the liquid phase close to equilibrium were obtained in approximately 20 min. The variations of enthalpy and entropy were positive, indicating that the process is endothermic and irreversible. Values obtained for the variation in Gibbs free energy showed that the extraction process using ethanol as a solvent is spontaneous and thermodynamically favorable for the moisture content of 0%, where the smaller the average particle size the greater the spontaneity of the process.http://dx.doi.org/10.1155/2015/871236 |
| spellingShingle | Silmara Bispo dos Santos Marcio Arêdes Martins Ana Lívia Caneschi Paulo Rafael Morette Aguilar Jane Sélia dos Reis Coimbra Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent International Journal of Chemical Engineering |
| title | Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent |
| title_full | Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent |
| title_fullStr | Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent |
| title_full_unstemmed | Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent |
| title_short | Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent |
| title_sort | kinetics and thermodynamics of oil extraction from jatropha curcas l using ethanol as a solvent |
| url | http://dx.doi.org/10.1155/2015/871236 |
| work_keys_str_mv | AT silmarabispodossantos kineticsandthermodynamicsofoilextractionfromjatrophacurcaslusingethanolasasolvent AT marcioaredesmartins kineticsandthermodynamicsofoilextractionfromjatrophacurcaslusingethanolasasolvent AT analiviacaneschi kineticsandthermodynamicsofoilextractionfromjatrophacurcaslusingethanolasasolvent AT paulorafaelmoretteaguilar kineticsandthermodynamicsofoilextractionfromjatrophacurcaslusingethanolasasolvent AT janeseliadosreiscoimbra kineticsandthermodynamicsofoilextractionfromjatrophacurcaslusingethanolasasolvent |