Emprego de catalisadores heterogêneos de CaO e SnO2 suportados em cinza de casca de arroz na obtenção de biodiesel
| Autor: | Paulo Roberto Nagipe da Silva, Jair C. C. Freitas, Ana Brígida Soares, Alexandre M. Stumbo |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
inorganic chemicals
food.ingredient Catalyst support biodiesel Husk Soybean oil law.invention Catalysis lcsh:Chemistry chemistry.chemical_compound food law Calcination heterocyclic compounds Biodiesel organic chemicals heterogeneous catalyst food and beverages rice husk ash General Chemistry Transesterification respiratory system Oleic acid Agronomy chemistry lcsh:QD1-999 Nuclear chemistry |
| Zdroj: | Química Nova, Vol 35, Iss 2, Pp 268-273 (2012) Química Nova v.35 n.2 2012 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ |
| ISSN: | 1678-7064 |
| Popis: | Silica obtained from rice husk after acid leaching and calcination was compared to commercial silica as a catalyst support. CaO and SnO2 catalysts were prepared by impregnation and tested in the transesterification of soybean oil and the esterification of oleic acid. CaO catalysts showed basic character and were the most active for transesterification, whereas SnO2 catalysts were acid and the most effective for esterification. In both cases the performances of the catalysts prepared with rice husk ash and commercial silica were similar. These results demonstrate that rice husk is a cost-effective and environmentally-friendly source of silica that can be used as a catalyst support. |
| Databáze: | OpenAIRE |
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