| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308929 |
| ISSN: | 0104-6632 |
| Autors: | Sales, F.G1 Abreu, C.A.M2 Pereira, J.A.F.R3 |
| Institucions: | 1Universidade Federal do Ceara, Centro de Tecnologia, Fortaleza, Ceara. Brasil 2Universidade Federal de Pernambuco, Centro de Tecnologia, Recife, Pernambuco. Brasil 3Universidade Estadual de Campinas, Faculdade de Engenharia Quimica, Campinas, Sao Paulo. Brasil |
| Any: | 2004 |
| Període: | Jun |
| Volum: | 21 |
| Número: | 2 |
| Paginació: | 211-218 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | In the present work a process of catalytic wet air oxidation of lignin obtained from sugar-cane bagasse is developed with the objective of producing vanillin, syringaldehyde and p-hydroxybenzaldehyde in a continuous regime. Palladium supported on g-alumina was used as the catalyst. The reactions in the lignin degradation and aldehyde production were described by a kinetic model as a system of complex parallel and series reactions, in which pseudo-first-order steps are found. For the purpose of producing aromatic aldehydes in continuous regime, a three-phase fluidized reactor was built, and it was operated using atmospheric air as the oxidizer. The best yield in aromatic aldehydes was of 12%. The experimental results were compatible with those values obtained by the pseudo-heterogeneous axial dispersion model (PHADM) applied to the liquid phase |
| Disciplines | Química |
| Paraules clau: | Ingeniería química, Catálisis, Oxidación por aire húmedo, Lignina, Vainillina, Siringaldehído, p-hidroxibenzaldehído, Catalizadores, Paladio, Reactor de lecho fluidizado |
| Keyword: | Chemistry, Chemical engineering, Catalysis, Wet air oxidation, Lignin, Vanillin, Syringaldehyde, p-hydroxybenzaldehyde, Catalysts, Palladium, Fluidized bed reactor |
| Text complet: | Texto completo (Ver HTML) |
