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Título: | K2MgSiO4 : a novel K+-trapped biodiesel heterogeneous catalystproduced from serpentinite Mg3Si2O5(OH)4. |
Autor(es): | Ballotin, Fabiane Carvalho Cibaka, Thérèse Ebambi Benfica, Tatiana Aparecida Ribeiro dos Santos Santos, Eleonice Moreira Teixeira, Ana Paula de Carvalho Lago, Rochel Montero |
Palavras-chave: | Serpentinite Biodiesel |
Data do documento: | 2016 |
Referência: | BALLOTIN, F. C. K2MgSiO4: a novel K+-trapped biodiesel heterogeneous catalystproduced from serpentinite Mg3Si2O5(OH)4. Journal of Molecular Catalysis. A, Chemical, v. 422, p. 258-265, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S1381116916300395>. Acesso em: 26 set. 2016. |
Resumo: | In this study, a new catalyst for biodiesel synthesis, based on K2MgSiO4, was produced from the mineralserpentinite. TG, SEM, XRD, AA, BET analyses showed that serpentinite Mg3Si2O5(OH)4impregnated withKOH (5,10 and 20 wt%), and thermally treated at 500◦C, 700 and 900◦C, can be converted to the main crys-talline phase K2MgSiO4. Analyses by TPD-MS (CO2) and titration suggested the presence of weak/mediumbasic sites in relatively high concentrations. Biodiesel production using soybean oil (methanol:soybean oilratio of 1:12, 1:9; 1:6, 60◦C) showed yields higher than 95% with catalyst at 10 wt%, which can be reusedfor three consecutive times without significant decrease on the reaction yield. The obtained results arediscussed in terms of a new catalytic phase based on K+ions trapped in the cavities of the MgSiO42−structure containing negatively charged oxygen basic sites. |
URI: | http://www.repositorio.ufop.br/handle/123456789/7043 |
DOI: | https://doi.org/10.1016/j.molcata.2016.02.006 |
ISSN: | 1381-1169 |
Licença: | O periódico Journal of Molecular Catalysis A: Chemical concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3963030240623. |
Aparece nas coleções: | DEALI - Artigos publicados em periódicos |
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ARTIGO_NovelKTrapped.pdf | 2,24 MB | Adobe PDF | Visualizar/Abrir |
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