| Texto completo | |
| Autor(es): |
Rodrigues, Raphael
;
Mandelli, Dalmo
;
Goncalves, Norberto S.
;
Pescarmona, Paolo P.
;
Carvalho, Wagner A.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL; v. 422, p. 9-pg., 2016-10-01. |
| Resumo | |
Niobium-aluminum-based catalysts were synthesized by a sol-gel process and successfully applied to the reaction of acetalization of acetone with glycerol yielding 2,2-dimethyl-1,3-dioxolane-4-methanol (solketal) and 2,2-dimethyl-1,3-dioxan-5-ol. The synthesis procedure was developed using high throughput techniques and the materials prepared with molar ratio1 Metal (1Nb:xAl): 100H(2)O: 1.5NH(4)OH (in which x =1, 0.6, 0.3, 0.1 and 0.05) were selected to be further investigated. The obtained series of mixed oxides displayed high catalytic activity reaching glycerol conversion up to 84%, with 98% of selectivity towards solketal. The physicochemical properties of the investigated catalysts were characterized by N-2-adorption/desorption, thermal analysis, X-rays diffraction, FTIR and Raman spectroscopy, and by adsorption of pyridine monitored by FT-IR spectroscopy and TGA. The catalysts are truly heterogeneous and can be reused in consecutive runs without loss of activity. (C) 2016 Elsevier B.V. All rights reserved. (AU) | |
| 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 |