Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/4771
Título : Chemometric approaches on glycerol oxidation with H2O2 over supported gold nanoparticles
Autor: Nunes, Cleiton A.
Guerreiro, Mário C.
Palavras-chave: Glycerol
Gold nanoparticles
Catalyst
Chemometrics
Data da publicação: 11-Jan-2013
Referência: NUNES, C. A.; GUERREIRO, M. C. Chemometric approaches on glycerol oxidation with H2O2 over supported gold nanoparticles. Journal of Molecular Catalysis A: chemical, Seoul, v. 370, p. 145-151, Apr. 2013.
Abstract: 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.
URI: http://www.sciencedirect.com/science/article/pii/S1381116913000083
http://repositorio.ufla.br/jspui/handle/1/4771
Idioma: en
Aparece nas coleções:DCA - Artigos publicados em periódicos

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