Seite - 123 - in Advanced Chemical Kinetics

Eachrateconstant, ki, isdefinedas: ki¼Aie �EAi RT (9) whereAi is the frequency factorandEAi is theactivationenergy. Figure 6. Glycerol consumption plots over Au/γ-Al2O3 catalysts prepared by various reducing agents: (a) Small gold nanoparticles (ca4nm)showzero-orderkineticbehaviourby linearly fittingconversionasafunctionof reaction time; (b) biggoldnanoparticles (ca17and21nm)showfirst-orderkineticsby linearly fitting the logofconcentrationofglycerolas a functionof reaction time. The catalystswere reducedwith 5%H2 (~4nm), THPC (~17nm) andPVA–citrate (~21nm). Catalystpreparationdetailswereoutlinedelsewhere [14]. Oxidation of Glycerol to Lactic Acid by Gold on Acidified Alumina: A Kinetic and DFT Case Study http://dx.doi.org/10.5772/intechopen.70485 123