简介：Shallowfreshwaterbodiesinpeatareascouldbeanimportantcontributortogreenhousegasesintheatmosphere.Inthisstudy,thepartialpressureofCO2inthesurfacewateroftheDianshanLakewasinvestigatedinsituinAugust2011.TheaveragepCO2inthestudyareawas2300μatmandfluctuatedwithintherangeof989–5000μatm.pCO2showedareversetrendtothevariationsofpHandDOinthesurfacewateroftheDianshanLake.ThewatertoairdiffusionfluxofCO2oftheupstream,middlelakeanddownstreamwererespectively63,33and14mmol/m2/d.Onaverage,thediffusionfluxofCO2ofthewholelakewas31mmol/m2/d.Consequently,ourresultsshowthatduringthesamplingseason,theDianshanLakeappearstobeagreatsourceofCO2.ItisalsodemonstratedthatrespirationcouldbethedominantbiochemicalreactionintheDianshanLakeinsummer.

简介：植物干物质有90%～95%是来自光合作用.如何充分利用照射到地球表面的太阳辐射能,提高光能利用率,以促进光合作用进行是农业生产中的一个根本性问题.光、温、水、肥和CO2等都可以影响单位绿叶面积的光合效率.

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简介：本文分析了某公司二期CO2压缩机润滑油消耗高的原因。提出了改进措施。以及实施后取得了较好的节能效果，进一步指出了CO2压缩机的节能空间。

简介：在南海西部油田的油气勘探中，经常钻遇大量的CO2等非烃类气。根据CO2与烃类气的物理性质差异，利用不同测井资料计算的视孔隙度差异来识别CO2，并根据图版估算CO2含量，结果得到了录井资料、取样分析资料的验证，该方法在南海西部油田取得了良好的应用效果。

简介：ＡｖｉｓｉｏｎｔｒａｃｋｉｎｇｓｙｓｔｅｍｏｆｒｏｂｏｔＣＯ２ｓｈｏｒｔｔｒａｎｓｆｅｒｗｅｌｄｉｎｇＷｕＲｅｎｙｕ；ＷａｎｇＧｕｏｄｏｎｇａｎｄＬｉＸｉａｏｑｉ（ＴｉａｎｊｉｎＵｎｉｖｅｒｓｉｔｙ）ＺｈａｎｇＬｉａｎｃｈａｎｇ(ＭｏｔｏｒｏｌａＣ?..

简介：EstablishingpositiveandurgenttargetsforCO2reductionandemissionpeak,andpromotingenergyconservationandenergystructureadjustmentareamongthestrategiestoaddressglobalclimatechangeandCO2emissionsreduction.Theyarealsomeanstobreakthroughtheconstraintsofdomesticresourcesandenvironment,andinternalneeds,toachievesustainabledevelopment.Generallyspeaking,acountry’sCO2emissionpeakappearsafterachievingurbanizationandindustrialization.Bythen,connotativeeconomicgrowthwillappear,GDPwillgrowslowly,energyconsumptionelasticitywilldecrease,andenergyconsumptiongrowthwillslowdown-dependentmainlyonnewandrenewableenergies.Fossilfuelconsumptionwillnotincreasefurther.WhenCO2emissionreachesitspeak,theannualreductionrateofCO2intensityofGDPisgreaterthanGDPannualgrowthrate;andtheannualreductionrateofCO2intensityofenergyuseisgreaterthantheannualgrowthrateofenergyconsumption.Therefore,threeimportantapproachestopromotionofCO2emissionpeakcanbeconcluded:maintainingreasonablecontrolofGDPgrowth,strengtheningenergyconservationtosignificantlyreducetheGDPenergyintensity,andoptimizingtheenergymixtoreducetheCO2intensityofenergyuse.Byaround2030,Chinawillbasicallyhavecompleteditsrapiddevelopmentphaseofindustrializationandurbanization.ConnotativeeconomicgrowthwillappearwiththeaccelerationofindustrialstructureadjustmentThetargetofGDPenergyintensitywillstillbetomaintainanaverageannualreductionof3%orhigher.Theproportionofnon-fossilfuelswillreach20-25%,andtheaimwillbetomaintainanaverageannualgrowthrateof6-8%.Thetotalannualenergydemandgrowthof1.5%willbesatisfiedbythenewlyincreasedsupplyofnon-fossilfuels.TheannualdeclineinCO2intensityofGDPwillreach4.5%orhigher,whichiscompatiblewithanaverageannualGDPgrowth

简介：Wesynthesizedonequaternaryammoniumpolymericionicliquids（PILs）P[VBTHEA]ClandthreeimidazoliumPILsofP[VEIm]Br,P[VEIm]BF4,P[VEIm]PF6byfree-radicalpolymerizationinsolution.ThesePILswerecharacterizedbyFT-IR,1H-NMR,13C-NMR,TGA,XRDandSEM.TheirCO2adsorptioncapacitiesweremeasuredunderdifferentpressuresandtemperaturesbyconstant-volumetechnique.ItwasobservedthatquaternaryammoniumPILsofP[VBTHEA]ClhavehigheradsorptioncapacityforCO2thanthoseimidazoliumPILs,followingP[VBTHEA]Cl>P[VEIm]PF6>P[VEIm]BF4>P[VEIm]Br,whichmaybeascribedtohigherpositivechargedensityonammoniumcationthanthatonimidazoliumcationandthusstrongerinteractionwithCO2,consistentwiththeresultsfromdual-modeadsorptionmodelthatammoniumPILshavemuchhigherCO2bulkabsorptionthanimidazoliumPILs.CO2adsorptioncapacityofP[VBTHEA]Clis9.02mg/gunder295Kand1bar,whichiscomparabletothatofsomeotherPILs,andismuchhigherthanthatofthecorrespondingILsmonomer.ThesePILshavegoodadsorptionselectivityforCO2overN2andregenerationefficiency.

简介：摘要在利用CO2汽提法生产尿素的过程中，合成塔是一种重要的尿素生产装置。在化学合成尿素的过程中，在合成塔内主要完成甲铵脱水的步骤。基于此，本文就CO2汽提法，探讨了合成塔中的具体操作，仅供参考。

简介：研究表明,全球CO2浓度变化有二大特点,一是北半球具有明显的季节变化,而南半球由于各纬度上的浓度变化很小,没有明显的季节变化.二是两个半球又有一个相同的特点,那就是都有较大的逐年增高的趋势,各地的平均年增长率在1.4至1.7ppmv/a之间.南北两半球相比,北半球的年平均浓度要高出4ppmv,年平均增长率也要略高一些.研究还表明,大气CO2浓度的变化还具有10年左右的周期,而且与厄尔尼诺年的关系比较密切.

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简介：摘要CO2气体保护焊的工作效率较高、焊接的质量高、投入成本低且操作简易，因此应用范围较广。但是，在利用CO2气体保护焊进行相应的焊接工作时，很容易产生飞溅的问题。本文从CO2气体保护焊产生飞溅的原因入手进行研究，提出了减少飞溅的相关措施。

简介：AprototypeRamanlidarwasdesignedformonitoringtroposphericCO_2profileandotherscientificin-vestigations.ThethirdharmonicofNd:YAGlaser(354.7-nmwavelength)wasusedasstimulatedlightsourcetoprovidenighttimemeasurements.FilterwithhighrejectionratioperformancewasusedtoextractCO_2RamansignalsfromRayleigh-Miescatteringsignalseffectively.Toimprovetherealtimemonitoringfunction,atwo-channelsignalcollectionsystemwasdesignedtocollectCO_2andN_2Ramanscatteringsig-nalssimultaneously.TheN_2Ramanscatteringsignalswereusedtoretrieveaerosolextinctioncoefficient.TypicalfeaturesofCO_2concentrationprofileandaerosolextinctioncoefficientinHefeiwerepresented.ThemixingratioofatmosphericCO_2inHefeicanreachabout360-400ppmv.

简介：本文分析了山西分公司二期CO2压缩机润滑油消耗高的原因,介绍了采取的针对措施以及2002年取得的节能效果,并进一步指出了CO2压缩机的节能空间.

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简介：Amine-silicacompositematerialsforpost-combustionCO2capturehaveattractedconsiderableattentionbecauseoftheirhighCO2uptakeatlowCO2concentrations,excellentCO2captureselectivityinthepresenceofmoisture,andlowerenergyrequirementsforsorbentregeneration.Thisreviewdiscussestherecentadvancesinamine-silicacompositesforCO2capture,includingadsorbentpreparationandcharacterization,CO2captureunderdryandmoistureconditionsatdifferentCO2partialpressures,sorbentregeneration,andstabilityaftermanycyclicsorption-desorptionruns.

简介：摘要：我国低渗透已开发油田油藏由于难以建立有效驱替，往往采油速度低、采收率低，新发现资源又以特低渗透油藏和致密油藏等难动用储量为主。急需寻求新的开发方式来进一步提高低渗透老油田采收率和新油田的动用率。本文以胜利油田低渗透滩坝砂油藏为例，对CO2驱开发阶段划分进行了研究，将CO2驱划分为5个开发阶段，为低渗透油藏CO2驱开发动态分析、跟踪调控及效果评价奠定基础。

简介：摘要：低渗透油藏非均质性强，注水能量补充困难，压力分布不均衡，导致开发效果差异大。室内及矿场试验表明，CO2驱可以有效提高原油采油收率。CO2驱油效果好坏与储层发育特征、原油物性和生产参数密切相关，严重时可导致气窜，影响后期的采收率和经济效益，为此本文以正理庄油田樊142-1块为例，采用油藏工程方法和数值模拟方法，分析了注采方向、压裂规模、地层压力、井网形式和注采井距等CO2驱影响因素，为下步低渗油藏动态调整提供一定的指导意义。

简介：摘要：目前，世界上最常用的尿素生产工艺是气提。中国是尿素生产大国，尿素厂数量居世界第一，产量和产能居世界第一。然而，目前我国能源工业面临着来自外部世界的各种压力，这就要求尿素合成工业的节能增产技术需要得到有效的改进。本文对CO2汽提生产尿素技术进行了研究和分析，以供参考。