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时间:2019-05-15
《离子液体水复配吸收剂捕获CO2性能》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、万方数据第64卷第2期化工学报V01.64No.22013年2月CIESCJournalFebruary2013离子液体一水复配吸收剂捕获C02性能李天成1,孔庆华1,陈郴1,朴香兰2(1清华大学核能与新能源技术研究院,北京100084;2化学工程联合国家重点实验室(清华大学),北京100084)摘要:基于绿色合成方法制备出亲水性离子液体(ILs)[NH。一C。mim][Br],从有效降低CO:吸收一解吸操作成本出发,采用ILs—HzO复配吸收剂,开展了常温加压CO:吸收及吸收剂常温减压解吸再生实验。结果表明,比COz吸收量(基于复配吸收剂或离子液体组
2、分)随复配吸收剂中ILs组分浓度而变;吸收初期,CO:吸收速率随吸收剂配比变化显著;以COz高吸收率和吸收剂低成本为目标,优选出新型水基复配吸收剂(离子液体与水质量比为1.38:1)。分别以水基离子溶液、改良热钾碱液和活化复配醇胺液为吸收剂,在自行搭建的超重力场强化吸收一连续逆流接触(an热或减压)解吸再生台架实验装置上进行了CO:捕获与吸收剂再生连续化实验。结果表明,在超重力场作用下,改良热钾碱液和活化复配醇胺液对CO。有较好的捕获,吸收率分别在98%、96%和90%以上,3种吸收剂经加热或减压解吸再生后均可循环回用,水基离子溶液吸收剂在常温减压下解
3、吸更具有实际可操作性。关键词:功能化离子液体;复配水基吸收剂;超重力场;碳捕获DOI:10.3969/j.issn.0438—1157.2013.02.026中图分类号:TQ116.3文献标志码:A文章编号:0438—1157(2013)02—0600—09C02capturewithcomplexabsorbentofionicliquidandwaterLITianchen91,KONGQinghual,CHENChenl。PIAOXianglan2(1InstituteofNuclearandNewEnergyTechnology,Tsinghu
4、aUniversity,Beijing100084,China;2StateKeyLaboratoryofChemicalEngineering(TsinghuaUniversity),Beijing100084,China)Abstract:Asortoffunctionalhydrophilicionicliquid(ILs),[NH2一C3mim][Br],waspreparedbythegreensynthesisroute.AimingatreductionofoperationalcostsforC02absorptionandregene
5、rationandreuseofabsorbent,experimentsonC02captureandabsorbent—desorptionforregenerationandreusewerecarriedout.ExperimentalresultsshowedthatspecificcapacityofC02(onthebasisofcomplexabsorbentorILscomponent)changedwiththeconcentrationofILsinthecomplexabsorbent.Intheinitialstage,C02
6、absorptionrateschangedobviouslywiththeconcentrationofILs,andanappropriateratioofcomplexabsorbentwasobtained(massratioofILstowaterwas1.38:1).Moreover,continuousC09captureandabsorbentregenerationexperimentswerecarriedOutwithapilotscaleequipmentforabsorptionenhancedbysupergravityfi
7、eldanddesorptionviacounter—currentcontactundervacuumorbyheatingwithwater—basedionicliquidsolution,improvedhotpotassiumcarbonateandactivatedcomplexalcaminesasabsorbentrespectively.TheresultsindicatedgoodabsorptionforC02capturewithwater—basedionicliquidsolution,improvedhotpotassiu
8、mcarbonateandactivatedcomplexalcaminesundersupe
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