1. Metallo-stannosilicate heterogeneous catalyst for biodiesel production using edible, non-edible and waste oils as feedstock.
- Author
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da Silva, Danilo Antonio, Santisteban, Oscar A.N., de Vasconcellos, Adriano, Silva Paula, Alex, Aranda, Donato A.G., Giotto, Marcus Vinicius, Jaeger, Christian, and Nery, José G.
- Subjects
SILICATES ,HETEROGENEOUS catalysis ,PETROLEUM waste - Abstract
Graphical abstract Highlights • Stannosilicate was synthesized and characterized by XRD,SEM and solid-state MAS NMR. • XRD and solid-state MAS NMR revealed a structure of OPT metallosilicate. • The material was applied as heterogeneous catalyst for biodiesel production. • FAMEs or FAEEs yields higher than 90.0% using refined edible and non-edible oils. • FAEEs yield of 96.6% was obtained by the conversion of refined microalgae oil. Abstract This study reports the synthesis, physicochemical characterization by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and solid-state MAS NMR (
1 H,23 Na,29 Si and119 Sn 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 Ǻ, b = 12.469 Ǻ, and c = 10.654 Ǻ).119 Sn single-pulse MAS NMR results presented two resonance lines, at δ 1 = -683.8 ppm and δ 2 = -690.9 ppm, which were assigned to the tin 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. [ABSTRACT FROM AUTHOR]- Published
- 2018
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