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http://hdl.handle.net/1843/55831| Tipo: | Artigo de Periódico |
| Título: | K2MgSiO4: A novel K+-trapped biodiesel heterogeneous catalyst produced from serpentinite Mg3Si2O5(OH)4 |
| Autor(es): | Fabiane Carvalho Ballotin Thérèse Cibaka Ebambi Tatiana Aparecida Ribeiro dos Santos Benfica Eleonice Moreira Santos Ana Paula de Carvalho Teixeira Rochel Montero Lago |
| Resumo: | In this study, a new catalyst for biodiesel synthesis, based on K2MgSiO4, was produced from the mineral serpentinite. TG, SEM, XRD, AA, BET analyses showed that serpentinite Mg3Si2O5(OH)4 impregnated with KOH (5,10 and 20 wt%), and thermally treated at 500 °C, 700 and 900 °C, can be converted to the main crystalline phase K2MgSiO4. Analyses by TPD-MS (CO2) and titration suggested the presence of weak/medium basic sites in relatively high concentrations. Biodiesel production using soybean oil (methanol:soybean oil ratio of 1:12, 1:9; 1:6, 60 °C) showed yields higher than 95% with catalyst at 10 wt%, which can be reused for three consecutive times without significant decrease on the reaction yield. The obtained results are discussed 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. |
| Assunto: | Catalise heterogenea Biodiesel |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Instituição: | UFMG |
| Departamento: | ICX - DEPARTAMENTO DE QUÍMICA |
| Tipo de Acesso: | Acesso Restrito |
| Identificador DOI: | https://doi.org/10.1016/j.molcata.2016.02.006 |
| URI: | http://hdl.handle.net/1843/55831 |
| Data do documento: | 2016 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S1381116916300395 |
| metadata.dc.relation.ispartof: | Journal of Molecular Catalysis A: Chemical |
| Aparece nas coleções: | Artigo de Periódico |
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