Acidity and catalytic performance of Yb-doped SO2−4/Zr in comparison with SO2−4/Zrcatalysts synthesized via different preparatory conditions for biodiesel production

Sani, Yahaya Muhammad and Alaba, Peter Adeniyi and Raji-Yahya, Aisha Olatope and Aziz, A.R.Abdul and Daud, Wan Mohd Wan (2015) Acidity and catalytic performance of Yb-doped SO2−4/Zr in comparison with SO2−4/Zrcatalysts synthesized via different preparatory conditions for biodiesel production. Journal of theTaiwan Institute of Chemical Engineers. pp. 1-10.

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Abstract

Highlyefficient,robustandmesoporoussulfatedzirconia,SZcatalystswerepreparedbyco-precipitationandincipient-wetnessrouteswithsufficientandin-excessacid.ThestudyinvestigatedtheeffectofpH,precur-sortype,andconcentration,onSZandcomparedtheiracidityandperformancewithytterbium-dopedSZtowardtransesterification.N2sorption,elementalanalysis,XRD,andammoniatemperature-programmeddesorption(NH3-TPD)revealedthepropertiesofthecatalyticmaterials.ThespecificsurfaceareaincreasesindependentlyofthepresenceofTiupto60.33m2/g,withincreasingpHwhileporesizeofthetetrago-nalcrystallitesdecreasesfrom37.04to6.83nm.Soakingthematerialinsufficient0.5-MH2SO4produced37.04nmSBETincontrastto21.21nmfromsoakinginexcess.Doublesulfationensuredsulfateincorporationwhilemoderateprecursoramountsenhancedactivityofthematerials.Interestingly,despitelowspecificsur-facearea,whichwasduetoshortagingperiod,largemesoporosity,highamount,anddispersionofactivesitesonYb-dopedSZ,SZr-Ti-Yb-500-4/sensuredremarkableactivity.Thecatalystconvertedca.99%ofusedfryingoilcontainingca.48wt.%FFA.Consequently,thishighlightstheprospectofproducingbiodieselatlowercostespeciallywithcurrentdwindlingpriceofcrudeo

Item Type:	Article
Uncontrolled Keywords:	Catalyst preparation Bifunctional catalyst Acid activation Solid acid catalyst Biodiesel
Subjects:	T Technology > T Technology (General) T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	17 Aug 2018 10:53
Last Modified:	17 Aug 2018 10:53
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/11374

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