| Texto completo | |
| Autor(es): |
Goncalves, Maraisa
;
Rodrigues, Raphael
;
Galhardo, Thalita S.
;
Carvalho, Wagner A.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | FUEL; v. 181, p. 46-54, OCT 1 2016. |
| Citações Web of Science: | 19 |
| Resumo | |
The glycerol acetalization reaction in the presence of acetone was evaluated using acidic carbon-based catalysts from biodiesel waste as catalysts. Acidic carbon-based catalysts were prepared with different glycerin: sulfuric acid mass ratios at 457 K for 24 h. The amount of acid groups as well as the acidity (mainly attributed to sulfur groups) enhance with an increase of glycerol: sulfuric acid ratio (1: 2 and 1: 3, named GC-1: 2 and GC-1: 3, respectively), reaching 0.9 mmol g(-1) for sulfur and 3.8 mmol g(-1) for total acidity. Very promising results were obtained when these carbon-based catalysts were tested as catalysts in glycerol acetalization, reaching about 80% of glycerol conversion and about 95% of solketal selectivity, this product has been applied as a fuel additive. Furthermore, the carbon-based catalysts surface groups showed high stability under the reaction conditions tested in this study. These results indicated that acidic carbon-based catalysts derived from glycerin are very attractive catalysts for glycerol acetalization. (C) 2016 Elsevier Ltd. All rights reserved. (AU) | |
| Processo FAPESP: | 11/22264-4 - Aproveitamento de resíduos lignocelulósicos e de glicerol para preparação de carvões com propriedades ácidas |
| Beneficiário: | Maraisa Gonçalves |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 13/21160-6 - Conversão catalítica de glicerol e acetol promovida por nanopartículas metálicas suportadas em carbono e em peneiras moleculares |
| Beneficiário: | Wagner Alves Carvalho |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 14/18529-0 - Preparação de carvão ativado com elevada área superficial utilizando como precursor o resíduos de biodiesel |
| Beneficiário: | Maraisa Gonçalves |
| Modalidade de apoio: | Bolsas no Brasil - Jovens Pesquisadores |