Adsorptive removal of nitrogen-containing compounds from fuel by metal-organic frameworks-中国Betway体育网页登陆

摘要 Theadsorptivedenitrogenationfromfuelsoverthreemetal-organicframeworks(MIL-96(Al),MIL-53(Al)andMIL-101(Cr))wasstudiedbybatchadsorptionexperiments.Fournitrogen-containingcompounds(NCCs)pyridine,pyrrole,quinolineandindolewereusedasmodelNCCsinfuelstostudytheadsorptionmechanism.ThephysicochemicalpropertiesoftheadsorbentswerecharacterizedbyXRD,N2physicaladsorption,FT-IRspectrumandHammettindicatormethod.Themetal-organicframeworks(MOFs),especiallytheMIL-101(Cr)containingLewisacidsitesaswellashighspecificsurfacearea,canadsorblargequantitiesofNCCsfromfuels.Inaddition,theadsorptivecapacityoverMIL-101(Cr)willbedifferentforNCCswithdifferentbasicity.ThestrongerbasicityoftheNCCis,themoreitcanbeabsorbedoverMIL-101(Cr).Furthermore,poresizeandshapealsoaffecttheadsorptioncapacityforagivenadsorbate,whichcanbeprovedbytheadsorptionoverMIL-53(Al)andMIL-96(Al).Thepseudo-second-orderkineticmodelandLangmuirequationcanbeusedtodescribekineticsandthermodynamicsoftheadsorptionprocess,respectively.Finally,theregenerationoftheusedadsorbenthasbeenconductedsuccessfullybyjustwashingitwithethanol.

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Adsorptive removal of nitrogen-containing compounds from fuel by metal-organic frameworks

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