| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000309051 |
| ISSN: | 0104-6632 |
| Authors: | Vargas, R.M.F1 Cassel, E Gomes, G.M.F Longhi, L.G.S Atti-Serafini, L2 Atti-Santos, A.C |
| Institutions: | 1Pontificia Universidade Catolica do Rio Grande do Sul, Faculdade de Engenharia, Porto Alegre, Rio Grande do Sul. Brasil 2Universidade de Caxias do Sul, Instituto de Biotecnologia, Caxias do Sul, Rio Grande do Sul. Brasil |
| Year: | 2006 |
| Season: | Sep |
| Volumen: | 23 |
| Number: | 3 |
| Pages: | 375-382 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | Baccharis trimera is a native Brazilian plant which has medicinal properties. In this work a method of supercritical extraction was studied to obtain the popularly essential oil from Baccharis trimera, known as carqueja. The aim was to obtain experimental data and to compare two mathematical models used in the simulation of carqueja (Baccharis trimera) oil extraction by supercritical CO2. The two mathematical models are based on mass transfer. One of the models, proposed by Reverchon, is solved numerically and requires two adjustable parameters from the experimental data. The other model chosen is the one proposed by Sovová. This model is solved analytically and requires four adjustable parameters. Numerical results are presented and discussed for the adjusted parameters. The experimental results are obtained in a temperature range of 313.15 K to 343.15 K at 90 bar. The extraction yield of carqueja essential oil using supercritical carbon dioxide ranged between 1.72 % (w/w) at 323.15 K and 2.34 % (w/w) at 343.15 K, 90 bar with a CO2 flow rate of 3.34.10-8 m³/s for a 0.0015 kg sample of Baccharis trimera |
| Disciplines: | Química |
| Keyword: | Fitoquímica, Aceites esenciales, Extracción supercrítica, Plantas medicinales, Baccharis trimera |
| Keyword: | Chemistry, Phytochemistry, Essential oils, Supercritical extraction, Medicinal plants, Baccharis trimera |
| Full text: | Texto completo (Ver HTML) |
