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|Título :||Chemometric approaches on glycerol oxidation with H2O2 over supported gold nanoparticles|
|Autor:||Nunes, Cleiton A.|
Guerreiro, Mário C.
|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.|
|Aparece nas coleções:||DCA - Artigos publicados em periódicos|
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