简介：为研究城市区域近地面CO2浓度变化特征,于2016年1月-12月对济南城市大气中CO2浓度进行了连续观测.结果表明,CO2具有明显的日变化规律,其中春、夏、秋季存在一峰一谷的现象,而冬季只有一峰.CO2浓度随季节变化明显,浓度最高值出现在冬季1月份,最低值出现在夏季6月份.CO2与SO2相关性较高,说明二者都来源于燃煤贡献.CO2浓度与风速和气温呈负相关关系,而与相对湿度呈正相关关系.

简介：CO2capturewithionicliquids（ILs）hasattractedmanyattentions,andmostworksfocusedonabsorptionabilityatambienttemperatures,whileseldomresearchwasconcernedatelevatedtemperatures.ThisnotonlylimitstheCO2absorptionapplicationatelevatedtemperature,butalsothedeterminationoftheoperationconditionoftheCO2desorptiongenerallyoccurringathighertemperature.ThisworkmainlyreportedCO2solubilitiesinILsatelevatedtemperaturesandrelatedpropertieswerealsoprovided.1-alkyl-3-methylimidazoliumbis（trifluoromethylsulfonyl）imide（[CnMIm][Tf2N]）ILswereselectedasphysicalabsorbentsforCO2captureinthisworkduetotheirrelativehigherCO2absorptioncapacitiesandgoodthermalstabilities.Thelong-termstabilitytestsshowedthat[CnMIm][Tf2N]isthermallystableat393.15Kforlongtime.CO2solubilitiesin[CnMIm][Tf2N]weresystematicallydeterminedattemperaturesfrom353.15Kto393.15K.ItdemonstratedthatCO2solubilityobviouslyincreaseswiththeincreaseofpressurewhileslightlydecreaseswithincreaseoftemperature.Asthelengthofalkylchainonthecationincreases,CO2solubilityinILsincreases.Additionally,thethermodynamicpropertiesincludingtheGibbsfreeenergy,enthalpy,andentropyofCO2werealsocalculated.

简介：ReducingtheanthropogenicCO2emissionsfromfossilresourcecombustionandhumanactivitieshasbecomeoneofthemajorchallengeswearefacingtoday.BeyondthosepracticalapplicationsfortheutilizationofCO2,suchasthesynthesisofsalicylicacid,methanol,urea,NaHCO3-Na2CO3chemicalsandrecentlydevelopedpolycarbonatesynthesis,scientistsarestillseekingnewmaterialsandtechnologiesforefficientcapture,

简介：TheeffortonelectrochemicalreductionofCO2tousefulchemicalsusingtherenewableenergytodrivetheprocessisgrowingfastrecently.Inthisreview,weintroducetherecentprogressesontheelectrochemicalreductionofCO2insolidoxideelectrolysiscells（SOECs）.Athightemperature,onlyCOisproducedwithhighcurrentdensitiesandFaradicefficiencywhilethereactoriscomplicatedandabettersealingtechniqueisurgentlyneeded.Thetypicalelectrolytessuchaszirconia-basedoxides,ceria-basedoxidesandlanthanumgallates-basedoxides,anodesandcathodesareintroducedinthisreview,andthecathodematerials,suchasconventionalmetal–ceramics（cermets）,mixedionicandelectronicconductors（MIECs）arediscussedindetail.Inthefuture,togainmorevalue-addedproducts,theelectrolyte,cathodeandanodematerialsshouldbedevelopedtoallowSOECstobeoperatedattemperaturerangeof573–873K.Atthosetemperatures,SOECsmaycombinetheadvantagesofthelowtemperaturesystemandthehightemperaturesystemtoproducevariousproductswithhighcurrentdensities.

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

简介：Co-electrolysisofCO2andH2Ousinghigh-temperaturesolidoxideelectrolysiscells（SOECs）intovaluablechemicalshasattractedgreatattentionsrecentlyduetothehighconversionandenergyefficiency,whichprovidesopportunitiesofreducingCO2emission,mitigatingglobalwarmingandstoringintermittentrenewableenergies.AsingleSOECtypicallyconsistsofanionconductingelectrolyte,ananodeandacathodewheretheco-electrolysisreactiontakesplace.Thehighoperatingtemperatureanddifficultactivatedcarbon-oxygendouble-bondofCO2putforwardstrictrequirementsforSOECcathode.Greateffortsarebeingdevotedtodevelopsuitablecathodematerialswithhighcatalyticactivityandexcellentlong-termstabilityforCO2/H2Oelectro-reduction.Thesofarcathodematerialdevelopmentisthekeypointofthisreviewandalternativestrategiesofhigh-performancecathodematerialpreparationisproposed.UnderstandingthemechanismofCO2/H2Oelectro-reductionisbeneficialtohighlyactivecathodedesignandoptimization.Thusthepossiblereactionmechanismisalsodiscussed.Especially,amethodincombinationwithelectrochemicalimpedancespectroscopy（EIS）measurement,distributionfunctionsofrelaxationtimes（DRT）calculation,complexnonlinearleastsquare（CNLS）fittingandoperandoambientpressureX-rayphotoelectronspectroscopy（APXPS）characterizationisintroducedtocorrectlydisclosethereactionmechanismofCO2/H2Oco-electrolysis.Finally,differentreactionmodesoftheCO2/H2OcoelectrolysisinSOECsaresummarizedtooffernewstrategiestoenhancetheCO2conversion.Otherwise,developingSOECsoperatingat300-600°CcanintegratetheelectrochemicalreductionandtheFischer-TropschreactiontoconverttheCO2/H2Ointomorevaluablechemicals,whichwillbeanewresearchdirectioninthefuture.

简介：

简介：Embodiedcarbonintradehasattractedtheattentionofresearchers,developers,andindustryleadersworldwide,asithasbecomeaconsiderablesourceoftradeconflict.BecauseChinaistheworld’sleadingcarbon-emittingcountry,itisimportanttostudythechangetrendsofembodiedCO2inChinesetradetoidentifykeyinfluencingfactors.ThispaperinvestigatesthetradeembodiedCO2inChina,withspecialfocusontheproductionprocessandmaterialsofeachindustrialsectorfrom1990to2013.Thisstudywasconductedbyusinganinput-outputmodel,whichanalyzesthespecificcausesofperiodicwaves.Ourfindingssuggestthatthemachinemanufacturingsectorproducedthelargestshareofemissions,whereasthemetalandnon-metalsectorhasthehighestemissionintensity.Moreover,thetotalemissionquantitiesintradeincreasedfrom612to3331milliontonsin1990to2013,aperiodcharacterizedbydecentralizedtrendsinemissionsexportedtotradepartners.Wealsoemployedthelog-meanDivisiaindex（LMDI）modeltodecomposethecarbonemissionschangesintoexportstructure,exportscale,energystructure,andenergyintensity,andestimatetheinfluenceofthesefactorsatanumberoftimepoints.Wefoundthatenergyintensitycurbsemissionsincrease,andthatexportscaleexpansionisthestrongestdrivingforce.

简介：在不同植物社区(落叶松，桦树，丁香花，和草地)的公司2集中在黑隆贾恩格·福雷斯特在成长季节期间被测量学习的植物的花园日报在不同空格影响公司2集中的变化，季节、年度的动力学和因素。在在绿陆地的不同社区的公司2集中有一明显日报变化，长期地减少，并且温度影响了丁香花区域和草地。季节地，公司2在落叶松绿色陆地是最低的(344.03吗？

简介：TogaindeepinsightintotheMorphologicaleffectofNixMg1-xOcatalystsonthereactionofCO2reformingwithmethane,wedesignedandfabricatedthreedifferentspatialstructuralNixMg1-xOcatalysts.TheseNixMg1-xOcatalystswithspecificmodelssuchasrod,sheetandsphere,exhibitedvariousactivityandstabilityinCO2reformingreaction.HereinNixMg1-xOnanorodsdisplayedhighercatalyticactivity,inwhichmethaneconversionwasupto72%andCO2conversionwas64%at670°Cwithaspacevelocityof79,200mL/（gcath）,comparedwithnanosheetandnanospherecounterparts.Furthermore,bothcatalystsofNixMg1-xOnanorodandnanosheetshowedahighresistancetowardcokedepositionandsinteringofactivesitesintheprocessofCO2reformingofmethane.

简介：摘要目的试评价CO2激光对皱纹和光损伤疗效。方法2014年9月～2016年7月，医院皮肤美容科门诊共收治采用CO2激光治疗皱纹以及光损伤患者184例，随访1个月，评价疗效。结果治疗后面部皮肤皱纹，松弛，皮肤修复性增厚，色素沉着积分与CMSS评分低于治疗前，差异有统计学意义（P＜0.05）。治疗后，CMSS评分阳性率、轻度率、中度率低于治疗前，差异有统计学意义（P＜0.05）。结论CO2激光治疗皱纹和光损伤疗效肯定，能够有效减轻面部皮肤皱纹，松弛，皮肤修复性增厚，色素沉着问题，减轻患者体像障碍。

简介：

简介：摘要目的探讨CO2激光联合光动力治疗尖锐湿疣临床效果。方法研究我院2015年5月—2017年3月期间随机抽取的80例尖锐湿疣患者，分为对照组与观察组各40例，其中对照组运用CO2激光治疗，观察组运用CO2激光联合光动力治疗，分析两组患者治疗效果差异。结果在治愈率上，观察组为75%，对照组为37.5%，组间差异显著，P＜0.05；在复发率上，观察组为25%，对照组为62.5%，组间差异显著，P＜0.05；在不良反应率上，两组没有显著性差异，P＞0.05。结论CO2激光联合光动力治疗尖锐湿疣可以有效的保证治愈率，减少复发率，同时不会提升不良反应，治疗安全与效果均有保证。

简介：CO2photoreductionisanattractiveprocesswhichallowsthestorageofsolarenergyandsynthesisofsolarfuels.Manydifferentphotocatalyticsystemshavebeendeveloped,whilethealternativephoto-reactorsarestillinsufficientlyinvestigated.Inthiswork,photoreductionofCO2withH2OintoCH4wasinvestigatedinamodifiedconcentratingsolarreactor,usingTiO2andPt/TiO2asthecatalysts.TheTiO2andPt/TiO2sampleswereextensivelycharacterizedbydifferenttechniquesincludingpowderX-raydiffraction（XRD）,N2adsorption/desorptionandUV–visabsorption.ThecatalyticperformanceoftheTiO2andPt/TiO2samplesinthegasphasewasevaluatedunderunconcentratedandconcentratedXe-lamplightandnaturesolarlightwithdifferentconcentratingratios.VariousparametersofthereactionsystemandthecatalystswereinvestigatedandoptimizedtomaximizethecatalyticperformanceofCO2reductionsystem.Comparedwiththenormallightirradiation,theTiO2andPt/TiO2samplesshowhigherphotocatalyticactivity（about6–7times）forreducingCO2intoCH4underconcentratedXe-lamplightandnaturesolarlight.Intherangeofexperimentallightintensity,itisfoundthattheconcentrationofthelightmakesitsuitableforthecatalyticreaction,andincreasestheutilizationefficiencyoftheTiO2andPt/TiO2sampleswhiledoesnotdecreasethequantumefficiency.

简介：Inthiswork,a2Dcovalenttriazine-basedframeworkwaspreparedbyusing1,3-dicyanobenzo[c]thiophene（DCBT）asmonomertoeffectivelycaptureCO2.TheresultingCTF-DCBTwascharacterizedbyFT-IR,XPS,PXRD,elementalanalysis,SEM,TEM,andN2adsorption-desorption.TheresultsindicatethatCTF-DCBTispartiallycrystallineandhasultramicropore（6.5A?）aswellashighheteroatomcontents（11.24wt%and12.61wt%forNandS,respectively）.Inaddition,theBETsurfaceareaandtotalporevolumeofCTF-DCBTare500m2/gand0.26cm3/g,respectively.CTF-DCBTpossessesexcellentthermalstability（450°C）andchemicalstabilitytowardsboilingwater,4MHCl,and1MNaOH.TheCO2adsorptioncapacityofCTF-DCBTis37.8cm3/gat1barand25°C.Aftersixadsorption-desorptioncycles,thereisnoobviouslossofCO2uptakeobserved.Duetotheultramicroporeandhighheteroatomcontents,CTF-DCBThashighisostericheatsofadsorptionforCO2andhighselectivitiesofCO2overN2andCH4.At25°C,theCO2/N2andCO2/CH4selectivitiesare112.5and10.3,respectively,whicharehigherthanthoseofmostPOFs.BreakthroughcurvesindicatethatCTF-DCBTcouldeffectivelyseparateCO2/N2andCO2/CH4mixtures.

简介：CO2conversionviaphotocatalysisisapotentialsolutiontoaddressglobalwarmingandenergyshortage.PhotocatalysiscandirectlyutilizetheinexhaustiblesunlightasanenergysourcetocatalyzethereductionofCO2tousefulsolarfuelssuchasCO,CH4,CH3OH,andC2H5OH.Amongstudiedformulations,CubasedphotocatalystsarethemostattractiveforCO2conversionbecausetheCu-basedphotocatalystsarelow-costandabundancecomparingnoblemetal-basedcatalysts.Inthisliteraturereview,acomprehensivesummaryofrecentprogressonCu-basedphotocatalystsforCO2conversion,whichincludesmetalliccopper,copperalloynanoparticles（NPs）,copperoxides,andcoppersulfidesphotocatalysts,canbefound.Thisreviewalsoincludedadetaileddiscussiononthecorrelationsofmorphology,structure,andperformanceforeachtypeofCu-basedcatalysts.Thereactionmechanismsandpossiblepathwaysforproductionsofvarioussolarfuelswereanalyzed,whichprovideinsightintothenatureofpotentialactivesitesforthecatalysts.Finally,thecurrentchallengesandperspectivefutureresearchdirectionswereoutlined,holdingpromisetoadvanceCu-basedphotocatalystsforCO2conversionwithmuch-enhancedenergyconversionefficiencyandproductionrates.

简介：摘要归纳总结了火电厂CO2捕集的四类途径，并指出IGCC在CO2减排方面的优势，同时利用ASPENPLUS模拟软件对采用燃烧前捕集CO2的IGCC电站进行模拟和经济性分析。

简介：【摘要】目的 研究 CO2激光联合干扰素治疗尖锐湿疣的临床效果。 方法 选取本院性病门诊收治的53例尖锐湿疣住院病患，按照随机数字表法分为对照组与治疗组。两组均应用 CO2激光治疗，治疗后对照组涂抹夫西地酸软膏，不使用任何其它药物；治疗组涂抹重组干扰素 a2b凝胶。对比两组患者治疗有效性以及不良反应发生率差异。 结果 治疗组痊愈23例，复发 4例，痊愈率 85． 19％；对照组痊愈 15例，复发 11例，治愈率 57． 69％。不良反应方面，大面积皮损烧灼后，治疗组中 5例患者、对照组中 3例患者引起创面发炎，经口服抗生素后治愈。 结论 在常规CO2激光治疗下，联合应用重组干扰素 a2b凝胶治疗尖锐湿疣疗效更具优势。

简介：摘要现阶段，二氧化碳汽提法工艺是制取尿素的主要工艺，并且二氧化碳汽提法工艺的应用极为广泛，因此本文围绕二氧化碳气提法尿素装置在高负荷生产运行的条件下存在的问题和控制难点，以及相应的优化控制方法进行分析和阐述，并为操作人员提供操作思路和借鉴，从而确保装置的稳定运行。