Highly selective acetalization of glycerol with acetone to solketal over acidic carbon-based catalysts from biodiesel waste

Autor(es)

Goncalves, Maraisa ; Rodrigues, Raphael ; Galhardo, Thalita S. ; Carvalho, Wagner A.

• 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