第37卷第1期高校化学工程学报No.1Vol.372023年2月JournalofChemicalEngineeringofChineseUniversitiesFeb.2023文章编号：1003-9015(2023)01-0061-07柔性碳纤维基吸附剂的制备及CO2吸附性能元慧力,钟雯诗,郑淑娟,姜伟,胡庚申(浙江师范大学先进催化剂材料教育部重点实验室,浙江金华321004)摘要：为了解决粉末状固体吸附剂成本高、传质阻力大的缺点，以棉花碳化制得的碳纤维作为吸附剂载体，通过浸渍法负载五乙烯六胺(PEHA)制备了固体有机胺吸附剂。通过扫描电镜、物理吸附、红外、热重分析等对吸附剂进行表征，采用穿透曲线法对吸附剂的CO2吸附性能进行测试。结果表明，在500℃碳化得到的碳纤维C500具有最大的比表面积(471m2·g−1)。50PEHA/C500吸附剂在75℃时吸附量可达到4.05mmol·g−1，CO2吸附性能优异。对比粉末吸附剂，碳纤维之间具有更大的空隙，放大实验表明，50PEHA/C500比介孔氧化硅基吸附剂(50PEHA/SBA-15)具有更小的传质阻力。循环测试结果表明50PEHA/C500吸附剂具有优秀的再生性能。50PEHA/C500基吸附剂具有低成本、低传质阻力和优异的CO2捕获能力，展现出良好的应用前景。关键词：碳捕集；碳纤维；传质阻力；五乙烯六胺(PEHA)中图分类号：O647.32文献标志码：ADOI：10.3969/j.issn.1003-9015.2023.01.008PreparationofflexiblecarbonfiberbasedsorbentsandtheirCO2captureperformanceYUANHui-li,ZHONGWen-shi,ZHENGShu-juan,JIANGWei,HUGeng-shen(KeyLaboratoryoftheMinistryofEducationforAdvancedCatalysisMaterials,ZhejiangNormalUniversity,Jinhua321004,China)Abstract:Powderedsolidsorbentshaveproblemsofhighcostandlargemasstransferresistance.Inthisstudy,carbonfibersderivedfromcarbonizedcottonwereusedassupports,andsolidaminesorbentswerepreparedbyimpregnatingpentaethylenehexamine(PEHA)ontothecarbonfibers.Thesorbentswerecharacterizedbyscanningelectronmicroscopy,physicaladsorption,infraredandthermogravimetricanalysis.TheCO2adsorptionperformanceofthesorbentsweretestedbythebreakthroughcurvemethod.TheresultsshowthatcarbonfiberC500whichwascarbonizedat500℃hasthelargestspecificsurfacearea(471m2·g−1).Theadsorptioncapacityofthe50PEHA/C500adsorbentreached4.05mmol·g−1at75℃withexcellentadsorptionCO2performance.Comparedwithpowderadsorbents,thecarbonfibershavelargervoids,...
