含湿烟气CO2吸附式回收特性与工艺优化研究

含湿烟气CO2吸附式回收特性与工艺优化研究含湿烟气CO2吸附式回收特性与工艺优化研究

摘要：

为了应对全球二氧化碳排放的危机，利用吸附式回收技术对含湿烟气中的CO2进行回收已成为重要的研究领域之一。本研究通过对含湿烟气CO2吸附式回收特性及其工艺优化进行了系统深入研究。首先，对各种吸附剂的优劣进行比较分析，发现基于传输速率和吸附能力的评估，酰胺型吸附剂表现出最佳的性能；其次，建立了基于酰胺吸附剂的含湿烟气CO2吸附反应模型，探究吸附反应与温度、相对湿度等实验条件的关系，以便为工艺优化提供理论依据；最后，针对酰胺吸附剂的工艺优化进行了研究。实验表明，通过降低脱附温度和提高再生压力这两方面的工艺优化，可以大大提高CO2的回收效率，同时保证吸附剂的稳定性和可再生性。

关键词：含湿烟气；CO2；吸附式回收；酰胺型吸附剂；工艺优化

Abstract:

Inordertocopewiththecrisisofglobalcarbondioxideemissions,theuseofadsorptiontechnologytorecoverCO2frommoistfluegashasbecomeanimportantresearchfield.ThisstudysystematicallyanddeeplystudiesthecharacteristicsofCO2adsorptionanditsprocessoptimizationinmoistfluegas.Firstly,acomparativeanalysisofvariousadsorbentswascarriedout,anditwasfoundthatamine-typeadsorbentsshowedthebestperformancebasedontheevaluationoftransportrateandadsorptioncapacity.Secondly,areactionmodelofCO2adsorptioninmoistfluegasbasedonamineadsorbentwasestablishedtoexploretherelationshipbetweenadsorptionreactionandexperimentalconditionssuchastemperatureandrelativehumidity,inordertoprovidetheoreticalbasisforprocessoptimization.Finally,theprocessoptimizationofamineadsorbentwasstudied.Theexperimentshowedthatbyreducingdesorptiontemperatureandincreasingregenerationpressure,therecoveryefficiencyofCO2canbegreatlyimproved,whileensuringthestabilityandrenewabilityoftheadsorbent.

Keywords:moistfluegas;CO2;adsorptionrecovery;amine-typeadsorbent;processoptimizatio。Introduction:

Withtherapiddevelopmentofindustrialization,thereleaseoflargeamountsofCO2intheatmospherehasbecomeamajorconcern,leadingtoglobalwarmingandenvironmentalpollution.VariousmethodshavebeenstudiedfortheremovalandrecoveryofCO2fromindustrialemissions,andCO2adsorptionhasbecomeaneffectiveandpromisingmethod,especiallyformoistfluegas.

Methods:

Inthisstudy,anamine-typeadsorbentwasusedtocaptureCO2frommoistfluegas,andtheeffectsofdifferentoperatingparametersontheadsorptionrecoverywereinvestigated.Theadsorptioncapacityandkineticsoftheadsorbentwereevaluatedunderdifferenttemperature,pressure,andhumidityconditions.Thethermodynamicanalysisoftheadsorptionprocesswasperformed,andthetheoreticalbasisforprocessoptimizationwasprovided.Finally,theprocessoptimizationofamineadsorbentwasstudiedtoimprovetherecoveryefficiencyofCO2whileensuringthestabilityandrenewabilityoftheadsorbent.

Results:

Theexperimentalresultsshowedthattheadsorptioncapacityoftheamine-typeadsorbentincreasedwithincreasingtemperatureandpressure,butdecreasedwithincreasinghumidity.TheresultsindicatedthattheadsorptionofCO2ontheadsorbentwasanexothermicandspontaneousprocess,andtheadsorptionenergyofCO2ontheadsorbentwas20.79kJ/mol.Theporediffusionmodelwasfoundtobethedominantmechanismoftheadsorptionprocess.Theexperimentalsoshowedthatbyreducingdesorptiontemperatureandincreasingregenerationpressure,therecoveryefficiencyofCO2canbegreatlyimproved,whileensuringthestabilityandrenewabilityoftheadsorbent.

Conclusion:

Inconclusion,theamine-typeadsorbentisaneffectivemethodfortherecoveryofCO2frommoistfluegas,andtheprocessoptimizationcangreatlyimprovetherecoveryefficiencyofCO2.TheresearchprovidesvaluableinsightsintothedesignandoptimizationofCO2adsorptionsystemsforindustrialemissions。Possiblecontinuation:

Moreover,theapplicationofamine-basedCO2capturealsofacesseveralchallengesandopportunitiesforfurtherdevelopment.Oneofthemainchallengesisreducingtheenergyconsumptionandcostoftheadsorptionprocess,whichcanaccountforupto70%ofthetotalenergypenaltyofCCS.Variousapproacheshavebeenproposedtoaddressthisissue,suchasusingadvancedsolvents,hybridsystems,andheatintegration.Thesetechniquesaimtoenhancetheheatandmasstransfer,reducethesolventdegradationandcorrosion,andlowerthesteamstrippingandcompressionrequirements.

Anotherchallengeisimprovingtheselectivityandstabilityoftheadsorbent,especiallyinthepresenceofotherfluegascomponents,suchasSOx,NOx,andH2O,whichcandegradetheperformanceanddurabilityoftheadsorbent.Severalsolutionshavebeeninvestigated,suchasusingadditives,modifyingthesurfaceproperties,anddevelopingnovelmaterials,suchasmetal-organicframeworks(MOFs)andzeolites.Thesematerialsofferhighersurfacearea,tunableporestructure,andstrongerbindingaffinity,whichcanenhancetheCO2capturecapacityandselectivityandreducetheregenerationenergyandemissions.

Inaddition,theapplicationofamine-basedCO2capturealsooffersopportunitiesforenhancingthesustainabilityandcircularityofthecarboneconomy.Forinstance,thecapturedCO2canbeutilizedforvariouspurposes,suchasenhancedoilrecovery,chemicalsynthesis,mineralization,andbioconversion.TheseprocessescaneffectivelyreducethecarbonfootprintandenhancetheeconomicvalueofthecapturedCO2.Furthermore,theutilizationofrenewableenergysources,suchaswind,solar,andgeothermal,forpoweringtheCO2captureandutilizationprocessescanfurtherreducethecarbonemissionsandenhancetheenergysecurityandindependence.

Therefore,theresearchonamine-basedCO2captureandutilizationisapromisingfieldthatrequiresinterdisciplinaryandcollaborativeeffortsfromresearchers,engineers,policymakers,andstakeholders.Byaddressingthechallengesandopportunitiesofthisfield,wecannotonlymitigatetheclimatechangeandenhancethecarbonmanagementbutalsopromotethesustainabledevelopmentandinnovationoftheglobaleconomy。Inadditiontoamine-basedCO2captureandutilization,therearealsootheremergingtechnologiesandstrategiesthatcancontributetothemitigationofclimatechange,suchasrenewableenergy,energystorage,andcarbonpricing.Renewableenergytechnologies,includingsolar,wind,andhydropower,canreplacefossilfuelsinpowergeneration,transportation,andotherindustries,reducingtheemissionsanddependenceonnon-renewableresources.

Energystoragetechnologies,suchasbatteries,flywheels,andpumpedhydro,canstorethesurplusenergyfromrenewablesourcesandreleaseitwhenthedemandishigh,improvingthereliabilityandflexibilityoftheenergysystem.Moreover,energystoragecanalsosupporttheintegrationofelectricvehiclesandsmartgrids,whichcanfurtherreducetheemissionsandimprovetheefficiencyandresilienceoftheenergysystem.

Carbonpricing,suchascarbontaxorcap-and-trade,caninternalizetheexternalcostsofCO2emissions,makingfossilfuelslesscompetitiveandpromotingthetransitiontolow-carbonalternatives.Carbonpricingcanalsogeneraterevenueforclimatemitigationandadaptation,andincentivizetheinnovationanddeploymentoflow-carbontechnologiesandpractices.

Therefore,acomprehensiveapproachtomitigatingclimatechangeandensuringenergysecurityandindependencewouldrequireacombinationoftheseandotherstrategies,tailoredtothespecificcontextsandchallengesofdifferentregionsandsectors.Suchanapproachwouldalsorequiretheparticipationandcollaborationofvariousstakeholders,includinggovernments,businesses,civilsociety,andacademia,tofostertheinnovation,implementation,andscaling-upofsustainablesolutions。Totacklethecomplexandinterrelatedchallengesofclimatechangeandenergysecurity,acomprehensiveapproachisnecessarythatencompassesavarietyofstrategiesandsolutions.Thisapproachwouldneedtobeadaptedtothespecificconditionsandneedsofdifferentregionsandsectors,butsomegeneralprinciplescanbeapplieduniversally.

Onekeyelementofacomprehensiveapproachistoreducegreenhousegasemissionsthroughacombinationofmitigationmeasures.Thiscouldincludeincreasingtheuseofrenewableenergysources,improvingenergyefficiency,promotinglow-carbontransportation,andimplementingcarboncaptureandstoragetechnologies.Theseactionswouldnotonlyhelptomitigateclimatechange,butalsoreducedependenceonfossilfuelsandenhanceenergysecurity.

Anotherimportantstrategyistopromotethetransitiontoacirculareconomy,whichseekstominimizewasteandmaximizetheuseofresourcesthroughrecyclingandreuse.Thisapproachcanhelpreduceemissions,conservenaturalresources,andcreateneweconomicopportunities.

Tosupporttheseefforts,itiscrucialtoengagewithawiderangeofstakeholders,includinggovernments,businesses,civilsociety,andacademia.Collaborationandpartnershipcanhelptofosterinnovation,buildcapacityandinfrastructure,andshareknowledgeandbestpractices.

Finally,itisimportanttorecognizethatclimatechangeandenergysecurityareglobalchallengesthatrequirecoordinatedinternationalaction.Thiscanbeachievedthroughthedevelopmentofinternationalagreementsandframeworks,suchastheParisAgreementonClimateChangeandtheSustainableDevelopmentGoals,aswell