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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
