油页岩热解及燃烧的动力学研究 毕业论文

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1、摘要油页岩是一种重要的化石能源，其储量巨大，是石油和天然气的重要替代能源。合理地开发利用油页岩，对弥补能源资源不足，缓解国家石油短缺具有极为特殊的战略意义。对油页岩热解及燃烧的动力学进行研究是保证油页岩优化转化的前提，也是油页岩综合开发利用工作的基础。关键词油页岩热解燃烧等转化率法动力学AbstractOilshale,asoneoftheimportantfossilfuels,hasagreatdealofresources.Itistheimportantreplacementofoilandnaturalgas.Therea

2、sonableexploitationandutilizationofithasthespecialstrategicsignificancetomakeupthedeficiencyofenergyresourceandalleviatetheenergycrisis.Itisthefoundationofoilshaleoptimizeconversionthatthepyrolysisandcombustionkineticscharacteristicswasstudied.Inthepaper,thepyrolysisan

3、dcombustionkineticscharacteristicsofoilshalesamplesareinvestigatedbytheoreticalandexperimentalanalysis.Proximateanalysisandultimateanalysiswereconducted.ThepyrolysisbehaviorofHuadianandMaomingoilshalesampleswasstudiedonthethermogravimetricanalysis(TG，DTG)atdifferenthea

4、tingratesunderthenitrogenenvironment.Theapparentactivationenergyinpyrolysisreactionsofoilshalesampleshasbeenanalyzedbythreekindsofiso-conversionalmethods.TheSestak’scomplexmechanismwasusedtofitlinerforpyrolysisreactionmechanismofoilshale,andthedecompositionmechanismand

5、frequencyfactiorwereobtained.Theresultsshowedthattheactivationenergywasnotaconstantthroughoutthereactionprocess,andoilshalepyrolyticmechanismwascomplexandmainlyattributedtothenuclearmechanism.Furthermore,non-isothermalthermogravimetriccombustionexperimentsonoilshalesam

6、pleshavebeencarriedout.Twothermoanalyticalmethods(theCoats-Redfernmethodandisoconversionalmethod)areadoptedtocalculatetheapparentactivationenergyincombustionreactionofoilshalesamples.Theactivationenergycalculatedbytwomethodsshowedthatoilshalecombustionincludedtwophases

7、,andtheactivationenergyatlowtemperatureswaslowerthanathightemperatures.Theresultsanalyzedbytheisoconversionalmethodshowedoilshalecombustionwasacomplexmulti-stepreactionprocess,theCoats-Redfernmethodassumedthereactionmechanismanditwasnotreasonable.Inthemeantimetheresult

8、swerediscussed.Moreover,thecombustionperformanceofoilshaleanditssemi-cokearestudiedbyDSCandtheeffectofdifferentheatin