| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000309017 |
| ISSN: | 0104-6632 |
| Authors: | Cavalcante, A.M1 Torres, L.G Coelho, G.L.V |
| Institutions: | 1Universidade Federal Rural do Rio de Janeiro, Departamento de Engenharia Quimica, Rio de Janeiro. Brasil |
| Year: | 2005 |
| Season: | Mar |
| Volumen: | 22 |
| Number: | 1 |
| Pages: | 75-82 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Modified clays were used to remove ethyl acetate from aqueous solutions. These clays were regenerated using supercritical CO2. Structural changes in the montmorillonite clay after treatment with quaternary amines were studied. The surface properties of the modified clay changed from highly hydrophilic to highly organophilic. The clay was regenerated by percolation of a stream of CO2 through the porous montmorillonite matrix. Different pressures and temperatures were employed, resulting in different fluid conditions (gas, liquid, and supercritical). The experimental data was fitted with a simplified model. The best desorption result was found under supercritical conditions. A crossover effect was observed. The capacity of the modified clay as a pollutant attenuator remained almost unchanged after a regeneration cycle |
| Disciplines: | Química |
| Keyword: | Química orgánica, Ingeniería química, Acetato de etilo, Adsorción, Arcillas modificadas, Regeneración, Extracción supercrítica, Dióxido de carbono |
| Keyword: | Chemistry, Organic chemistry, Chemical engineering, Ethyl acetate, Adsorption, Modified clays, Regeneration, Supercritical extraction, Carbon dioxide |
| Full text: | Texto completo (Ver HTML) |
