Experimental Investigation on the Gasification

Experimental Investigation on the Gasification

ID:40383710

大小:2.27 MB

页数:5页

时间:2019-08-01

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1、Articlepubs.acs.org/EFExperimentalInvestigationontheGasificationKineticModelofaCharParticleinSupercriticalWaterHuiJin,*XiaoZhao,LiejinGuo,ChaoZhu,andWenwenWeiStateKeyLaboratoryofMultiphaseFlowinPowerEngineering,Xi’anJiaotongUniversity,Xi’an,Shaanxi710049,People’sRepubli

2、cofChinaABSTRACT:Supercriticalwatergasificationtechnologyhasbrightprospectsbecauseitcanconvertbiomassintohydrogen-richgaseousproductsinaneffectiveandcleanway.Thedevolatilizationprocessisrelativelyfast,andcharconversionistherate-determiningstepinthewholegasificationprocess

3、.Todiscussthekineticmodelofchargasificationinsupercriticalwater,thequartztubereactorwasadoptedasthereactortoomittheundesiredcatalyticeffectofthereactorwallandbamboocharcoalwasselectedastypicalcharasaresultofthelowvolatilecontent.Theexperimentswereinvestigatedwithintheope

4、ratingrangeoftemperaturesof700−900°Candresidencetimesof5−20min.Theexperimentalresultswereanalyzedwithintheframeworkofhomogeneous,non-reactedcore,andrandomporemodels.Dependencesofthecarbongasificationrate,residencetime,andtemperatureweredescribedinanassumptionofthefirst-o

5、rderreactionandtheArrheniusdependence.Thecalculationresultsshowedthattherandomporemodelfitthechargasificationprocessinsupercriticalwaterbestandtheactivationenergywas125.43kJ/mol.301.INTRODUCTIONactivationenergies.Liuetal.clarifiedthatthenon-reactedTherationaluseofbiomassh

6、asattractedgreatinterests,owingcoremodelwasnotappropriateanddevelopedamodifiedtothegradualdepletionoffossilenergyandthedeteriorationRPMforahighreactiontemperature.oftheecologicalenvironmentworldwide.1,2BiomasswillThecontributionmadebytheaboveinvestigatorstookthedefinitel

7、ycountalotinthefutureenergymarket3asaresultporouspropertiesintoaccount;however,theconclusionswereofthelargeworldwidebiomassresourcepotentialandthedrawnbasedontraditionalgasificationenvironments.SCWhasoptimisticlong-termcontribution.4,5Biomasssupercriticaluniquechemicala

8、ndphysicalproperties,especiallythenear-31,32watergasification(SCWG)wasfrequentlyinvestigatedbecausezerosurfacetensiona

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