| Texto completo | |
| Autor(es): |
da Silva, Danilo Antonio
;
Santisteban, Oscar A. N.
;
de Vasconcellos, Adriano
;
Paula, Alex Silva
;
Aranda, Donato A. G.
;
Giotto, Marcus Vinicius
;
Jaeger, Christian
;
Nery, Jose G.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 6, n. 4, p. 10-pg., 2018-08-01. |
| Resumo | |
This study reports the synthesis, physicochemical characterization by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and solid-state MAS NMR (H-1, Na-23, Si-29 and Sn-119 MAS NMR) of a metallo-stannosilicate and its application as a heterogeneous catalyst for biodiesel production via ethanolysis and methanolysis routes using edible, non-edible an waste oils as feedstocks. XRD characterization of the metallo-stannosilicate has revealed a typical structure of mixed octahedral-pentahedral-tetrahedral material with an orthorhombic unit cell (a = 14.522 angstrom, b = 12.469 angstrom, and c = 10.654 angstrom). Sn-119 single-pulse MAS NMR results presented two resonance lines, at delta(1)= -683.8 ppm and delta(2) = -690.9 ppm, which were assigned to the fin octahedrally coordinated in the metallo-stannosilicate structure. Heterogenous catalytic studies in the transesterification of refined edible, non-edible, and waste oils have resulted in high yields of FAMEs and FAEEs (fatty acid methyl and ethyl esters), nevertheless the highest FAMES (98.2%) and FAEEs (96.6%) yields were obtained for non-edible microalgae oil extracted from the genetically modified heterotrophic algal strain Prototheca moriformis. Catalytic studies also using non-edible macaw palm oil (Acrocomia aculeata) with a high content of free fatty acids (FFAs) demonstrated that the catalyst could simultaneously perform esterification and transesterification reactions. These findings indicate the potential application of this novel metallo-stannosilicate in the production of renewable and environmentally clean biofuels, like biodiesel, using different sources of lipids feedstocks, notably those that do not compete with food production. (AU) | |
| Processo FAPESP: | 11/51851-5 - Síntese e caracterização de catalisadores heterogêneos a base de complexos nanozeolitas/enzimas e sua aplicação na produção de biodiesel via Rota Etílica usando como matérias-primas óleo de palma |
| Beneficiário: | Jose Geraldo Nery |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |