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500 个结果
  • 简介:制备了几种CU-CO尖晶石,并用于催化CO2加氢合成低碳醇反应。结果表明,Cu-Co尖晶石是一种极具潜力的催化剂前驱体,具有出色的C2+醇合成能力。但是,当在该催化剂中加入KOH时,这种能力下降。XRD表征表明,KOH的加入破坏了CU-Co合金的生成。一些结果被讨论。更多还原

  • 标签: Cu-Co催化剂 CO2加氢 低碳醇合成
  • 简介:Ba1.0Co0.7Fe0.2Nb0.1O3-δ(BCFN)oxidewithperovskitecubicstructurewassynthesizedbysolidstatereactionmethod.CO2corrosionofBCFNmembranewasinvestigatedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),diffusereflectanceinfraredFouriertransformedspectroscopy(DRIFT)andX-rayabsorptionfinestructurespectroscopy(XAFS).Cobalt(Co)K-edgeabsorptionspectraofBCFNannealedinCO2revealthattheoxidationstatesofCoinallthesampleswerelargerthan+3andtheydecreasedwiththeincreaseofcalcinationtime.At800℃,1%CO2introducedintoHecouldspeedupthereductionofCocationsincomparisonwithpureHe.Inaddition,sulfateionsinthebulkofBCFNmembranepreferredtomigratetothesurfaceunderCO2calcinationandformmonoclinicBa(CO3)0.9(SO4)0.1besidesorthorhombicwitherite.Moreover,SEMresultsindicatethatthenucleationandgrowthofcarbonatesgrainsstartedatthegrainboundaryofthemembrane.

  • 标签: 钙钛矿型氧化物 CO2 氧化态 组织演变 退火 X射线吸收精细结构
  • 简介:ZrO2-WCcomposites展览可比较的机械性质部分为一些应用作为传统的WC公司材料,它提供一个机会给代替WC公司。在这研究,2mol.%Y2O3与40vol.%WC稳定了ZrO2composites在1150獮愠潭杮映汩?潣灭湯湥獴琠牨畯桧挠慨杲?牴湡晳牥洠'炭鷽?被巩固湩??映汩?瑡琠敨洠汯'虥N牡氠癥汥.獥吗??

  • 标签: 氧化钇稳定氧化锆 脉冲电流烧结 复合材料 碳化钨钴 机械性能 热稳定性
  • 简介:ToimprovethemechanicalpropertiesofWC-Al2O3composites,theeffectsoftraceamountofCeO2additivesonthemicrostructureandmechanicalpropertiesoftheWC-Al2O3compositespreparedbyhotpressingwereinvestigated.TheresultsrevealedthattheWC-Al2O3compositesdopedwith0.1%CeO2possessedrefinedmicrostructureandenhancedmechanicalpropertiescomparedwiththatoftheundopedWC-Al2O3composites.TraceCeO2suppressedthedecarburizationofWC,promotedthemicrostructuralrefinement,andimprovedtheinterfacecoherenceoftheWCmatrixandAl2O3.When0.1%CeO2wasaddedtotheWC-Al2O3composites,theeffectofCeO2resultedintheachievementofarelativedensityof98.82%withanexcellentVickershardnessof16.89GPa,combiningafracturetoughnessof9.85MPa·m1/2withanacceptableflexuralstrengthof1024.05MPa.

  • 标签: 复合材料 力学性能 显微组织 CEO2 添加剂 组织细化
  • 简介:TheAnhuiHuaihuaGroupCo.Ltd.islocatedinthecentreofHuainanCity,closetoHuainan’sninecoalminesandthreepowergeneratingplants,witheasy-to-reachtraffic,developedtelecommunications,favorablepolicyandadvantageousdevelopmentconditions.ThecompanyisAnhui’simportantbaseincoalandchemicals,withfixedassetsofRMB900million;itisaClassAlegalpersonenterprise,realizinganintegrationofcapitalandoperation.Productioncapabilityformainproducts:280,000tonsofsyntheticammonia,80,000tonsofconcentratednitrateacid,110,000tonsofcarbamide,140,000tonsofammoniumnitrate,60,000tonsofpuresoda,250m~2

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  • 简介:1.MainachievementsofenvironmentalprotectionFrom1987to1994,withdoublingoftheinstalledgeneratingcapacity,thecoalconsumptionofpowerplantsdoubledaswell.Powerindustryhasbeenfacingthechallengefromenvironmentalprotection.Inordertopromotethecoordinateddevelopmentofpowerindustryandenvironmentalprotection,powersector:

  • 标签: 刃口 出口
  • 简介:GansuRECo.Ltd.wasformerlyabery-lliumproducersetupin1970.ItchangedovertoproduceREproductsandrenamedin1975.ItislocatedinNorthwestChina’sin-dustrialcity,Lanzhou,thecapitalcityofGansuProvince.Ithasnearlythreehundredengineer-ingnersonnelandmorethantwentywellequippedproductionlinesbestsuitableforprocessingvariouskindsofrawmaterialsfromacrossthecountry.RE

  • 标签: GANSU PRODUCER LANZHOU ENGINEER hundred twenty
  • 简介:ThebindingofCo(bpy)2dppz3+tocalfthymusDNAwasinvestigatedbyusingabsorptionandemissionspectroscopy,DNAmeltingtechniques,cyclicvoltammetry,viscosityandelectro-phoresismeasurements,wherebpyis2,2’-bipyridyl,dppzisdipyrido[3,2-o:2’,3’-c]phenazine.Thebindingcompoundshowsabsorptionhypochromicity,fluorescenceenhancement,andincreasingofDNAmeltingtemperatureandthespecificviscosity.CVmeasurementshowstheshiftsinoxidation-reductionpotentialandchangeinpeakcurrentwithadditionofDNA.ThecompoundisalsoshowntobemoreefficientphotosensitisersforstrandbreaksinplasmidDNA.

  • 标签: Cobalt (Ⅲ) COORDINATION compound CALF THYMUS
  • 简介:摘要本文主要针对CO分离装置展开分析,思考了CO分离装置的技改措施,明确了CO分离装置的技改的具体的方法和方案,希望可以为今后的CO分离装置技改工作提供参考。

  • 标签: CO分离装置,技改,措施
  • 简介:LocatedontheDaxing'anlingforestregionofChina'sfrontier,theDaxing'anlingForestryGroupCo.isoneofthe500nationallargesizeenterprisegroupswithatotalmanagementareaof8.225millionha.Thereare10forestrybureausunderitsjurisdiction,93000in-servicestaffandapopulationof358000.Thenetvalueoffixedassetis3.58billionyuan,Accumulativetotaloutputoftimberhasamountedto110millionm3duringthepast38years.ItsprofitsandtaxturnedovertotheStatehast...

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  • 简介:摘要目的提高对CO中毒的脑部MRI表现的认识。方法回顾性总结分析16例CO中毒的病例,包括临床表现、影像学检查。所有病人均采用Philips1.5T核磁共振扫描机扫描,脑部平扫。结果全部患者表现不一,基本病程10分钟至2天。临床主要表现为不省人事、胸闷、精神异常等。CO中毒的脑部MRI表现主要为双侧基底节区对称性斑片状异常信号,T1WI低信号、T2WI及T2WIFLAIR高信号。结论CO中毒脑部MRI表现有特征性,可进行分型,能协助临床诊断和及时治疗,减少CO中毒迟发性脑病的发生。

  • 标签: CO中毒 核磁共振扫描机 图像处理
  • 简介:JinmaInternationalExpressCo.LtdwasfoundedinBeijinginApril1993.LocatedintheHuibinBuildinginthebeautifulAsianGamesVillage,itisajointventurebetweenChinaNationalMetalsandMineralsImportandExportCorporationandU.S.AirMarketExpress,Ltd,approvedbytheMinistryofForeign

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  • 简介:TianyangPharmaceuticalsCo.Ltdisamedium-sizedenterprisewiththreesubsidiaries,theWandongVeterinaryPharmaceuticalFactory,WandongFeedAdditiveFactoryandKangfaBiologicalProductsFactory,whichproduceover120products,suchasveterinarymedicines,feedadditives,medicinesforhumanuse,biologicalproductsandmedicalpackagingproducts.Itssuppositoryproductsfillthegapsintheprovince.Thecompanycoversanareaof70,600sqmwithaworkshopfloorageof14,300sqm.IthasfixedassetsofRMB19.03millionandcirculatingfundsofRMB9.93million.Atpresent,thecompanyhas405staffandworkersincluding50people

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  • 简介:在这份报纸,活跃光学和合作焦点,分割的镜子的试验性的系统被造。第一,分割的镜子的支持结构被设计,为分割的镜子的试验性的系统满足要求被模拟验证。在这个系统,大散焦并且倾斜/付小费给分割的镜子的错误被观察密度调整并且基于等斜的干扰理论干扰穗形成对照直到defocus并且倾斜/付小费给错误在Shack-Hartmann的侦探范围。然后,Shack-Hartmann被用来测量他们,他们被致动器调整。致动器被活跃光学控制为分割的镜子的好合作焦点认识到靠近环的调整和维护。并且干扰穗被利用验证Shack-Hartmann的侦探精确。在分割的镜子调整的合作焦点以后,倾斜/付小费给剩余表面错误比RMS好;defocus剩余表面错误比RMS好。

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