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2.81ꢀmmol/g,ꢀrespectively.ꢀHowever,ꢀtheꢀacidꢀsiteꢀdistributionꢀ
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onꢀ theꢀ catalystꢀ surfacesꢀ variedꢀ greatly.ꢀ Fig.ꢀ 9ꢀ showsꢀ thatꢀ theꢀ
NH ꢀdesorptionꢀpeakꢀappearedꢀatꢀaꢀlowerꢀtemperatureꢀforꢀtheꢀ
usedꢀcatalystꢀandꢀtheꢀpercentageꢀofꢀacidꢀsitesꢀwhoseꢀNH ꢀde‐
sorptionꢀtemperatureꢀisꢀaroundꢀ580ꢀ°Cꢀreduced.ꢀCombiningꢀtheꢀ
resultsꢀofꢀtheꢀcyclingꢀexperimentsꢀandꢀNH ‐TPDꢀanalysis,ꢀitꢀisꢀ
clearꢀthatꢀtheꢀsmallꢀchangeꢀinꢀconversionꢀisꢀrelatedꢀtoꢀtheꢀcon‐
stantꢀnumberꢀofꢀacidꢀsites,ꢀwhileꢀtheꢀreducedꢀn‐propanolꢀselec‐
tivityꢀisꢀassociatedꢀwithꢀtheꢀdecreaseꢀinꢀtheꢀnumberꢀofꢀacidꢀsitesꢀ
[
3
3
[
[
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whoseꢀNH
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ꢀdesorptionꢀtemperatureꢀisꢀaroundꢀ580ꢀ°C.ꢀItꢀcouldꢀ
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beꢀfurtherꢀconfirmedꢀthatꢀtheꢀeffectꢀofꢀacidꢀamountꢀandꢀspecif‐
ic‐intensityꢀ acidꢀ proportionꢀ onꢀ glycerolꢀ conversionꢀ andꢀ
n‐propanolꢀselectivityꢀwereꢀconsistentꢀwithꢀpreviousꢀreports.ꢀ
[
[
[
[
[
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pensiveꢀ process;ꢀ theyꢀ exhibitedꢀ goodꢀ selectivitiesꢀ forꢀ
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ofꢀglycerol.ꢀAcidꢀstrengthꢀcanꢀaffectꢀtheꢀdegreeꢀofꢀdehydroxyla‐
tionꢀofꢀglycerolꢀandꢀstrongꢀacidꢀsitesꢀpromoteꢀdeepꢀdehydrationꢀ
ofꢀ glycerolꢀ toꢀ formꢀ propanolꢀ (includingꢀ n‐propanolꢀ andꢀ
i‐propanol).ꢀ Theꢀ selectivityꢀ forꢀ n‐propanolꢀ mayꢀ beꢀ relatedꢀ toꢀ
theꢀ percentageꢀ ofꢀ specific‐intensityꢀ acidꢀ sitesꢀ andꢀ Ptꢀ particleꢀ
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[
[
[
size.ꢀTheꢀ2.5%Pt/Zr0.7Al0.3
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olꢀ conversion.ꢀ Afterꢀ optimizationꢀ ofꢀ theꢀ reactionꢀ conditions,ꢀ
1.2%ꢀ ofꢀ glycerolꢀ conversionꢀ andꢀ 86.3%ꢀ ofꢀ n‐propanolꢀ selec‐
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O ꢀcatalystꢀwithꢀaꢀZr/Alꢀmoleꢀratioꢀofꢀ
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[1] X.ꢀL.ꢀLuo,ꢀX.ꢀM.ꢀGe,ꢀS.ꢀQ.ꢀCui,ꢀY.ꢀB.ꢀLi,ꢀBioresour.ꢀTechnol.,ꢀ2016,ꢀ215,ꢀ
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[
GraphicalꢀAbstractꢀ
Chin.ꢀJ.ꢀCatal.,ꢀ2018,ꢀ39:ꢀ1121–1128ꢀ ꢀ ꢀ doi:ꢀ10.1016/S1872‐2067(18)63068‐2
Glycerolꢀhydrogenolysisꢀtoꢀn‐propanolꢀoverꢀZr‐Alꢀcompositeꢀ ꢀ
oxide‐supportedꢀPtꢀcatalystsꢀ
Sel > 86%
ChuangꢀLi,ꢀBoꢀHe,ꢀYuꢀLing,ꢀChi‐WingꢀTsang,ꢀChanghaiꢀLiangꢀ*ꢀ
DalianꢀUniversityꢀofꢀTechnology;ꢀ ꢀ
TechnologicalꢀandꢀHigherꢀEducationꢀInstituteꢀofꢀHongꢀKongꢀ
ꢀ
ꢀ
Zr‐Alꢀ mixedꢀ oxide‐supportedꢀ Ptꢀ catalystsꢀ withꢀ differentꢀ Zr/Alꢀ moleꢀ
ratiosꢀwereꢀsynthesizedꢀbyꢀanꢀimpregnationꢀmethodꢀandꢀusedꢀinꢀtheꢀ
selectiveꢀhydrogenolysisꢀofꢀglycerolꢀtoꢀn‐propanolꢀwithꢀhighꢀactivity,ꢀ
selectivity,ꢀandꢀabsoluteꢀreusability.ꢀ