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其对高炉煤气洗涤系统的影响进行了讨论.采用X射线衍射仪fundamentallystudiedinthepaper.Becauseponentofwasteplasticisveryplex,fivekindsofmodelplasticshavebeenselectedtobestudied.DecalescenceandegressofheatofdifferentplasticswasstudiedatconstanttemperatureandduringrisingintemperatureonconstantrateinoxidizingandprotectiveatmospherebyDTA.ThermogravimetriccharacteristicofplasticscrapwasstudiedbyTGatconstanttemperatureandduringrisingintemperatureonconstantrateinoxidizingandprotectiveatmosphere.ChlorideinbustionproductofPVCweremeasuredbyiodometricmethodandlunarcaustictitration,moreovertheinfluenceofChlorideonwashingdeviceofcoalgaswerediscussed.ComponentofsalvagestoreswasanalysedbyXRDThereslutesshow:Heatenduranceofdifferentplasticsaredifferent,subsequenceofheatenduranceofdifferentplasticsinN2:LPE,PP,ABS,PVC,PA6.Heatenduranceofdifferentplasticsaredifferent,subsequenceofheatenduranceofdifferentplasticsinair:LPE,PP,ABS,PVC,PA6.ThermogravimetriccurveofPVCistwo-part,firstClseparatefromPVC,secondanicmatterlossofweight.Speedoffirstreactionisfasterthansecondreaction.thermogravimetriccharacteristicofplasticscrapisfittingforfirst-orderreactionatoxidizingandprotectiveatmosphere.Itisavailtopromoteweightlosstoelevatetemperatureandoxygencanpromoteweightlossofplasticscrap.PlasticscrapcanquicklyburntincyclotronareaofBF.Thereisahypothesisthataveragetemperatureis1800℃inbackspinareaofblastfurnace,Calculatedbustiontimeofdifferentsamplesare40～71mswhenbustionrateis80%.Whentheweightofinjectedplastic(18%PVC)islessthan3.60kg/t.Fe,washingdeviceofcoalgascan'tbeeroded.CombusitionresidueofPA6areSiO2andC.CombusitionresidueofPVCareC22H14,Ca(ClO3)2,CaCO3,C.
Keywords:wasteplastic,injectingforblastfurnace,TG,PVC
论文题目:固体氧化物燃料电池Cu基阳极的制备与性能研究
PerparationandPerformanceofSolid-oxideFuelCellCu-based
Anodes
研究生姓名:彭军
导师姓名:安胜利教授
协助导师:宋希文副教授
赵文广副教授
专业:材料加工工程
摘 要:
化学共沉淀法可以制备比表面积大,颗粒小,分散良好,烧结体电导率高的固体电解质纳米粉末,但其成本较高且周期长,工作量大,低温燃烧合成法可以达到相同的效果,而且成本低,效率高.固体氧化物燃料电池用Ni加电解质作为阳极,在H2作为燃料时性能较好,但是用碳氢燃料时,由于Ni催化碳的沉积,使电池效率急剧下降,甚至由于碳的生长会破坏电池.Cu是一种惰性金属,对碳氢化合物的沉碳反应没有催化作用,是一种可能的固体氧化物燃料电池阳极材料.
采用低温燃烧合成法制备了氧化钐,氧化钆二元稀土掺杂氧化铈纳米粉体.利用DTA/TG热分析对硝酸铈/柠檬酸胶体的燃烧反应进行了研究,胶体的点火温度约为230℃.利用XRD和BET等现代物理测试方法对氧化铈纳米粉体的物相和比表面积等性能进行了表征,650℃焙烧的粉体具有立方萤石结构,高的比表面积,粉体的比表面积在41.116-23.847m2/g之间,平均颗粒直径为20.268nm-34.945nm,呈良好的分散状态.利用交流阻抗法测试了材料的电导率.结果表明,(CeO2)0.8(Sm2O3)0.08(Gd2O3)0.02固体电解质的电导率高最,900℃时达0.0973S·cm-1.
采用涂层法制备了Cu-CeO2基阳极燃料电池.利用恒电位法研究了阳极中Cu含量对阳极电导率的影响,得出CuO含量在不小于50%时,阳极中Cu才能形成连续的网络结构.利用能谱和线扫描对Cu烧结扩散进行了研究,发现对于Cu基阳极,在制备阳极时烧结温度不能超过1130℃,超过此温度后Cu向电解质扩散剧烈.
在H2气氛下测试了Cu基阳极固体氧化物燃料电池的性能.首先利用能谱和线扫描研究了700℃下阳极中Cu扩散行为,在此温度下Cu可以向电解质扩散,但速度非常缓慢,为沿晶扩散,并利用SEM研究了Cu颗粒长大情况,发现在650-850℃温度段Cu颗粒长大趋势小.利用Solartron1287A恒电位仪和Solartron1260A阻抗普仪测试电池V-I,W-I曲线及电池交流阻抗谱,得出Cu50%的阳极输出功率大,极化小,CeO2对阳极电化学反应有良好的催化作用.
关 键 词:低温燃烧合成,电导率,扩散,燃料电池,极化
ABSTRACT
ChemicalCo-precipitationcansynthesizenano-powdersofsolidelectrolyte,ithashighspecificsurfacearea,smallparticlesize,highdispersionbehaviours,andthesinterhashighionicconductivity,butthismethodhashighcost,longcycleandgreatworkload.Thelowtemperaturebustionsynthesiscanobtainsametarget,moreover,haslowcostandisefficient.Solidoxidefuelcell(SOFC),hasaanodethatismanufacturedbyaNi-electrolyteposite,isveryefficientwithhydrogen,butwitnhydrocarbonsfuel,Nickelhasahighcatalyticactivityforthedehydrogenationofthehydrocarbons,thustheefficiencyoftheSOFCsharplydeteriorate,andeventhecellisdestroyedbecausethecarboncontinuallygrowup.Copperisinertforcarbonformation,andispotentialanodematerialofSOFC.
TheSm2O3,Gd2O3dopedCeO2nano-powdersweresynthesizedbythelowtemperaturebustionsynthesis.Differentialthermalanalysis/themogravimertryanalysisresultsshowthattheignitingtemperatureofceriumnitrateandethyleneglycolredoxmixtureisabout230℃.ThephaseandspecificsurfaceareaofthedopedceriapowderswerecharacterizedbyXRDandBET,Theresultsshowthatdopedceriapowderscalcinedat650℃haveacubicfluoritestructure,highspecificsurfaceareathattherangeofthespecificsurfaceareaisfrom23.847m2/gto41.116m2/g,anaveragesizeof20.268nmto34.945nm,andahighdispersionbehaviours.TheionicconductivityofdopedCeriaelectrolytesweremeasuredbythea.cimpedancespectroscopytechnique.theresultsshowthat(CeO2)0.8(Sm2O3)0.08(Gd2O3)0.02solidelectrolytehasahighconductivity.itsconductivityis0.0973Scm-1at900℃.
Cu-CeO2-basedanodefuelcellismanufacturedbycoating.theTherelationbetweenconductivityofanodesandtheCucontentofanodesisstudiedbyPotentionstaticmeans.theresultsshowthatthecopperofanodeformcontinuousmeshworkstr
电化学有关论文范文素材,与硕士生学位文开题相关毕业论文格式范文参考文献资料：