英语翻译
Thereforedissociativeadsorption
ofhydrogenisreduced,andhencethechancetohavedirect
synthesis.19,28,31-33Hydrogenismorelikelytoreactwiththe
oxygenpresentonthePd2+surfacethanwiththeinnerpartof
thePdcluster,withtheconditionmentionedabove16,17,19,20,33,35
(i.e.,anacidicsolutionorthepresenceofhalides).Whencontact
timebetweenliquidandsolidphasesislonger,allthereactions
occur,addingfurtherH2O2degradationpaths.Forintermediate
gasandliquidflowrates,productionrateishigherandselectivity
achievesveryinterestingvalues.Gassolubilizationintheliquid
phaseplaysakeyrole;itcanbemodifiedbyusingsolventthat
selectivelyincreasesH2solubility,34butalsothepressureand
theratiobetweengasandliquidflowratescanaffectthe
concentrationofH2andO2intheliquidphase.
Theseobservationsallowconcludingthatoperativecondition
intheTBRmayhelpincontrollingthereactionnetwork,in
additiontosuitablecatalysts,linkingthecatalystandthereactor
designandoperation.Ithasbeenprovedthatoperativecondi-
tionsplayamajorroleindrivingthereactionstowardhigh
selectivityforhydrogenperoxide.Theresultssuggestthat
reactordesignandoperationmaybecrucialtoimprove
productivityandselectivityinH2O2synthesis,togetherwith
developingbettercatalysts.