Glycerol oxidation over gold nanoparticles supported on activated carbon: Chemometric monitoring of the reaction by ESI-MS and MIR [Oxida??o de glicerol sobre nanopartículas de ouro suportadas em carv?o ativado: Monitoramento quimiométrico da rea??o por ESI-MS e MIR]

摘要

A study on the monitoring of glycerol oxidation catalyzed by gold nanoparticles supported on activated carbon under mild conditions by chemometric methods is presented. The reaction was monitored by mass spectrometry- electrospray ionization (ESI-MS) and comparatively by mid infrared spectroscopy (MIR). Concentration profles of reagent and products were determined by chemometric tools such as Principal Component Analysis (PCA), Evolving Factor Analysis (EFA) and Multivariate Curve Resolution (MCR). The gold nanoparticle catalyst was relatively active in glycerol oxidation, favoring formation of high added value products. It was found that the reaction stabilization was reached at four hours, with approximately 70% glycerol conversion and high selectivity for glycerate.