Publicação
MICROWAVE-ASSISTED HYDROTHERMAL SYNTHESIS OF Ni-DOPED SnO2 NANOPARTICLES AND THEIR USE AS CATALYSTS IN BIODIESEL PRODUCTION
| Resumo: | The high chemical stability and low cost of tin dioxide has been widely reported in the literature, as has its microwave-assisted hydrothermal synthesis. The use of heterogeneous catalysts in biodiesel synthesis has proved very promising, with conversion rates exceeding 80%. The purpose of this study was to synthesize Ni-doped SnO2 for application as a heterogeneous catalyst in the transesterification of vegetable oils. The powders were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and N-2(g) adsorption/desorption using the Brunauer-Emmet-Teller (BET) method. The results revealed powders with nanometric agglomerates and high surface areas. Catalytic tests revealed an 80% retention factor and a decrease in the viscosity of babassu oil from 30.27 mm(2) s(-1) to 6.91 mm(2) s(-1), indicating that the synthesized catalyst can be used in the transesterification of vegetable oils. |
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| Autores principais: | De Sousa, D. G. |
| Outros Autores: | Oliveira, M. M.; Rangel, J. H. G.; Vasconcelos, J. S.; Longo, E. |
| Assunto: | SnO2 microwave-assisted hydrothermal method catalysts biodiesel |
| Ano: | 2018 |
| País: | Brasil |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | IBICT |
| Idioma: | francês |
| Origem: | Oasisbr |
| Resumo: | The high chemical stability and low cost of tin dioxide has been widely reported in the literature, as has its microwave-assisted hydrothermal synthesis. The use of heterogeneous catalysts in biodiesel synthesis has proved very promising, with conversion rates exceeding 80%. The purpose of this study was to synthesize Ni-doped SnO2 for application as a heterogeneous catalyst in the transesterification of vegetable oils. The powders were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and N-2(g) adsorption/desorption using the Brunauer-Emmet-Teller (BET) method. The results revealed powders with nanometric agglomerates and high surface areas. Catalytic tests revealed an 80% retention factor and a decrease in the viscosity of babassu oil from 30.27 mm(2) s(-1) to 6.91 mm(2) s(-1), indicating that the synthesized catalyst can be used in the transesterification of vegetable oils. |
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