Chemometric approaches on glycerol oxidation with H2O2 over supported gold nanoparticles
This paper reports a chemometric study of effects of the catalyst preparation method and reaction con- ditions on the efficiency of glycerol oxidation catalyzed by gold nanoparticles supported on activated carbon using H 2 O 2 as oxidant. Factorial designs and principal component analysis were used...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Brasil |
| Institución: | Universidade Federal de Lavras (UFLA) |
| Repositorio: | Repositório Institucional da UFLA |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ufla.br:1/4771 |
| Acceso en línea: | https://repositorio.ufla.br/handle/1/4771 http://www.sciencedirect.com/science/article/pii/S1381116913000083 |
| Access Level: | acceso abierto |
| Palabra clave: | Glycerol Gold nanoparticles Catalyst Chemometrics |
| Sumario: | This paper reports a chemometric study of effects of the catalyst preparation method and reaction con- ditions on the efficiency of glycerol oxidation catalyzed by gold nanoparticles supported on activated carbon using H 2 O 2 as oxidant. Factorial designs and principal component analysis were used for the evaluation of experimental conditions and reaction performance. Evaluating catalyst preparation condi- tions we found that larger Au nanoparticles are obtained using HAuCl 4 in higher concentration. Glycerol conversion and production of glycerate and tartronate were higher using catalysts prepared with low polyvinyl alcohol (PVA) to Au ratio and low Au content. Higher HAuCl 4 concentrations resulted in larger Au nanoparticles, which contributed to higher glycolate production. Evaluating reaction conditions we found that the influence of H 2 O 2 to glycerol ratio was insignificant. Glycerol conversion and production of glycerate and tartronate were higher at lower temperature. Increasing H 2 O 2 to glycerol ratio contributed to higher glycolate production. Glycerol to Au ratio has a smaller influence on the reaction course. |
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