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《聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO2吸附应用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学~E(WuliHuaxueXuebao)AprilActaP.-Chim.Sin.2014,30(4),789-796789[Article]doi:lO.3866/PKU.WHXB201402123ⅥnV.whxb.pku.edu.cn聚乙烯亚胺修饰的氧化硅纳米管基吸附剂的制备及其CO2吸附应用姚蔓莉董艳艳谢菁贾爱平谢冠群胡庚申罗孟飞(浙江师范大学物理化学研究所,先进催化剂材料教育部重点实验室,浙江金华321004)摘要:以P123为模板,1,2.二(三甲氧基硅基)乙烷(BTME)为硅源合成了介孔氧化硅纳米管(E-SNTs).将E-SNTs经过聚乙烯亚胺(
2、PEI)修饰后制得吸附剂用于捕捉CO.对吸附剂进行了透射电镜(TEM)、物理吸附、傅里叶变换红#I-(FTIR)光谱、热重分析(TGA)等表征.E—SNTs—PEI吸附剂的最佳CO吸附温度为75。C.吸附剂的CO吸附量随着PEI负载量的增加呈现先增大后减小的趋势,其中5O%为最佳负载量,此时吸附剂的吸附量最大为3.32mmol·g~.相比较SBA.15基吸附剂,E.SNTs基吸附剂具有更优异的吸附性能.在有水汽的存在下,吸附剂E.SNTs.50的CO:吸附量达到3.75mmol·g~.经过四次循环吸脱附实验测试E—SNTs—PEI吸附剂的稳定性能,结果表明其CO:吸附
3、量基本不变,该吸附剂表现出较好的稳定性和可再生能力.关键词:介孔纳米管氧化硅:聚乙烯亚胺:吸附:COz捕捉中图分类号:0643PreparationofPolyethylenimine-FunctionalizedSilicaNanotubesandTheirApplicationforCO2AdsorptionYAOMan-LiDONGYan-YanXlEJingJIAAi·-PingXlEGuan·-QunHUGeng—ShenLUOMeng-Fei(KeyLaboratoryoftheMinistryofEducationforAdvancedCatalysis
4、Materials,InstituteofPhysicalChemistryZhejiangNormalUniversity,Jinhua321004,ZhejiangProvince,PR.China)Abstract:Mesoporousethane.silicananotubesfE-SNT_s1weresynthesizedusingP123asatemplateand1。2.bis(trimethoxysily1)ethane(BTME)asasilicasource.E.SNisweremodifiedwithpolyethylenimine(PEI)as
5、sorbentsforCO2adsorption.Thesenewcompositesorbentswerecharacterizedbytransmissionelectronmicroscopy(TEM),nitrogenadsorption/desorption,Fouriertransf0rminfrared(FTIR)spectroscopy,andthermalqravimetricanalysis(TGA1.Wefoundthat75。CiStheOptimaltemperatureforCO2adsorption.E.SNTswitha50%(PEIl
6、oading(E—SNTs一50)exhibitedahigherCO2adsorptioncapacity(3.32mmo卜g)thantheothermaterials.TheE.SNTs.basedsorbentsshowbeRerCO2captureperformancethantheSBA_15-basedsorbents.Additionally,CO2uptakewasfurtherenhancedto3.75mmOI.g。inthepresenceofmoisture.CyclicCO2adsorption.desorptiontestresultsi
7、ndicatedthatthecompositeSOrbentsarestableandcanberegenerated.KeyWords:Mesoporoussilicananotube;Polyethylenimine;Adsorption;C02capture1引言生产活动的扩大,排放在空气中的CO:气体越来越自工业化革命以来,随着人口的剧增以及工业多,导致了全球气候的变暖以及气候异常现象的加Received:December30,2013;Revised:February1,2014;PublishedonWeb:February12,201
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