| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308960 |
| ISSN: | 0104-6632 |
| Autors: | Mantovaneli, I.C.C1 Ferretti, E.C Simões, M. R Silva, C. Ferreira da |
| Institucions: | 1Universidade Estadual do Oeste do Parana, Centro de Engenharias e Ciencias Exatas, Toledo, Parana. Brasil |
| Any: | 2004 |
| Període: | Sep |
| Volum: | 21 |
| Número: | 3 |
| Paginació: | 449-458 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Stevia is being used as a sweetener due to its low calorific value and its taste, which is very similar to that of sucrose. After extraction from dried leaves, stevia extract is dark in colour so needs to be clarified for better acceptance by consumers. Adsorption is one of the most important processes in this clarification. In this work the clarification of extract stevia extract in fixed-bed columns with calcium zeolites was studied. Two temperatures (10ºC and 30ºC) and six different flow rates (2, 5, 9, 12, 16 and 19 mL/min) were studied. The results showed that the mass-transfer coeffcient increases with an increase in flow rate and the length of unused bed reaches a maximum at 9 mL/min for both temperatures. The fit of the Thomas model with the breakthrough data was not very good |
| Disciplines | Química |
| Paraules clau: | Química de alimentos, Ingeniería química, Edulcorantes, Stevia, Extracto acuoso, Clarificación, Zeolitas, Columnas de lecho fijo, Curva de ruptura, Modelo de Thomas |
| Keyword: | Chemistry, Food chemistry, Chemical engineering, Sweeteners, Stevia, Aqueous extracts, Clarification, Zeolites, Fixed bed columns, Breakthrough curve, Thomas model |
| Text complet: | Texto completo (Ver HTML) |
