| Revista: | Ecletica quimica |
| Base de datos: | |
| Número de sistema: | 000552731 |
| ISSN: | 0100-4670 |
| Autores: | Garção de Carvalho, Carlos Eduardo1 Consolin-Filho, Nelson3 Regiani, Anelise Maria1 Sartori, Rogerio Antonio1 Duarte de Farias, Andréa Maria4 Simões Cadaxo Sobrinho, Edilson1 Pizarro Borges, Luiz Eduardo2 de Araújo Gonzalez, Wilma2 |
| Instituciones: | 1Universidade Federal do Acre, Centro de Ciências Biológicas e Naturais, Rio Branco, Brasil., 2Instituto Militar de Engenharia, Departamento de Engenharia Química, Rio de Janeiro, Brasil., 3Universidade Federal de Tecnologia do Paraná, Coordenação de Química, Campo Mourão, Brasil., 4Instituto Nacional de Tecnologia, Rio de Janeiro, Brasil., |
| Año: | 2014 |
| Volumen: | 39 |
| Número: | 1 |
| Paginación: | 35-48 |
| País: | Brasil |
| Idioma: | Inglés |
| Resumen en inglés | Biodiesel is considered an important substitute of diesel oil. Traditionally, it is obtained by the transesterification of vegetable oils with methanol or ethanol, catalyzed by NaOH or KOH. Heterogeneous catalysts have been studied with the aim at facilitating and diminishing costs with purification stages. In the present work, the Na/Nb2O5 system was evaluated on the reaction of soybean oil with ethanol. It was verified, by DRX and IR, that the niobia calcined at 500ºC and impregnated with sodium underwent greater structural alterations than that treated at 300°C. These modifications allowed the generation of basic properties on niobia surface (Hammett and CO2 adsorption /IR). This catalyst showed the highest conversion (30%) among the used materials. The method chosen for evaluating the catalysts yield was the 1H NMR spectroscopy. |
| Keyword: | biodiesel, transesterification, heterogeneous catalysis, niobium |
| Texto completo: | Texto completo (Ver PDF) |
