化學鏈燃燒技術中氧載體CaSO-,4-的性能研究.pdf

1、華中科技大學碩士學位論文化學鏈燃燒技術中氧載體CaSO的性能研究姓名：張璐申請學位級別：碩士專業(yè)：熱能工程指導教師：鄭瑛20090523華中科技大學碩士學位論文華中科技大學碩士學位論文IIAbstractItiswidelyacceptedtodaythatCO2emissionsescalatethegreenhouseeffecthencecontributetoahigheraveragetemperatureonearth.Th

2、ereisanurgentneedfdevelopingnewtechniquesfCO2capturetocontrolthegreenhousegaswithlessenergyloss.Chemicalloopingcombustion(CLC)iscompletelydifferentfromthetraditionaloneCO2capturetakesplaceduringcombustionwithoutenergypen

3、altywithnoneedofspecialCO2separationequipmentByusingthisprocessNOxfmationcanbeeliminatedwithouttheuseofNOxtechnologies.CLCinvolvestheuseofametaloxideasanoxygencarrierthattransfersoxygenfromtheairtothefuelavoidingdirectco

4、ntactbetweenfuelparingwithmetaloxidescalciumsulfatehasproventobeakindofnewoxygencarrierwithsufficientreactivitiesinreductionoxidationreactionswithenoughabilityfcarryingoxygennosecondarypollution.Inthispaperfixedbedreacti

5、susedtodeterminethereactionperfmanceofcalciumsulfate.InthisstudythecyclictestofaCaSO4basedoxygencarrierinalternatingreducingsimulatedcarbonmonoxidemethaneoxidizingconditionswasperfmedat950Cinafixedbedreactatatmosphericpr

6、essure.ThereleaseofSO2duringthecyclictestwasfoundtoberesponsiblefthedecreaseofreactivityofaCaSO4oxygencarrierbyanalyzingthechemicalmechanismofoffgas.XraydiffractionanalysisrevealedthatthepresenceofCarbonDepositionduringt

7、hecyclictestofaCaSO4inmethaneAir.Surfacemphologyanalysisdemonstratesthatthenaturalanhydriteparticlesurfacevariedfromimpervioustopousafterthecyclictest.Thereisn’tanysinteringbetweendifferentoxygencarriers.Keywds:Chemicall