离子液体-水复配吸收剂捕获CO2性能

doi:10.3969/j.issn.0438-1157.2013.02.026

化工学报 ›› 2013, Vol. 64 ›› Issue (2): 600-608.DOI: 10.3969/j.issn.0438-1157.2013.02.026

离子液体-水复配吸收剂捕获CO₂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

收稿日期:2012-08-01 修回日期:2012-12-19 出版日期:2013-02-05 发布日期:2013-02-05
通讯作者: 李天成(1969—),男,博士,副研究员。
作者简介:李天成(1969—),男,博士,副研究员。
基金资助:
化学工程联合国家重点实验室开放课题(SKL-ChE-10A02);"十一五"国家科技支撑计划项目(2008BADC4B012)。

CO₂ capture with complex absorbent of ionic liquid and water

LI Tiancheng¹, KONG Qinghua¹, CHEN Chen¹, PIAO Xianglan²

1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;
2. State Key Laboratory of Chemical Engineering(Tsinghua University), Beijing 100084, China

Received:2012-08-01 Revised:2012-12-19 Online:2013-02-05 Published:2013-02-05
Supported by:
supported by the Opening Foundation of State Key Laboratory of Chemical Engineering (2020619) and the Key Projects in the National Science & Technology Pillar Program(2008BADC4B012).

摘要/Abstract

摘要： 基于绿色合成方法制备出亲水性离子液体(ILs)[NH₂-C₃mim][Br],从有效降低CO₂吸收-解吸操作成本出发,采用ILs-H₂O复配吸收剂,开展了常温加压CO₂吸收及吸收剂常温减压解吸再生实验。结果表明,比CO₂吸收量(基于复配吸收剂或离子液体组分)随复配吸收剂中ILs组分浓度而变;吸收初期,CO₂吸收速率随吸收剂配比变化显著;以CO₂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-连续逆流接触(加热或减压)解吸再生台架实验装置上进行了CO₂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CO₂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

Abstract: A sort of functional hydrophilic ionic liquid (ILs),[NH₂-C₃mim][Br],was prepared by the green synthesis route.Aiming at reduction of operational costs for CO₂ absorption and regeneration and reuse of absorbent,experiments on CO₂ capture and absorbent-desorption for regeneration and reuse were carried out.Experimental results showed that specific capacity of CO₂ (on the basis of complex absorbent or ILs component) changed with the concentration of ILs in the complex absorbent.In the initial stage,CO₂ absorption rates changed obviously with the concentration of ILs,and an appropriate ratio of complex absorbent was obtained(mass ratio of ILs to water was 1.38:1).Moreover,continuous CO₂ capture and absorbent regeneration experiments were carried out with a pilot scale equipment for absorption enhanced by super gravity field and desorption via counter-current contact under vacuum or by heating with water-based ionic liquid solution,improved hot potassium carbonate and activated complex alcamines as absorbent respectively.The results indicated good absorption for CO₂ capture with water-based ionic liquid solution,improved hot potassium carbonate and activated complex alcamines under super gravity field,and the absorption rates for CO₂ were 98%,96% and 90% respectively.Adsorbent could be regenerated and reused after CO₂ removal under vacuum or by heating.Water-based ionic liquid solution desorption under vacuum and at normal temperature was more practicable.

Key words: functional ionic liquids, water based complex absorbent, super gravity field, carbon dioxide capture

中图分类号:

TQ116.3

李天成, 孔庆华, 陈郴, 朴香兰. 离子液体-水复配吸收剂捕获CO₂性能[J]. 化工学报, 2013, 64(2): 600-608.

LI Tiancheng, KONG Qinghua, CHEN Chen, PIAO Xianglan. CO₂ capture with complex absorbent of ionic liquid and water[J]. CIESC Journal, 2013, 64(2): 600-608.

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离子液体-水复配吸收剂捕获CO₂性能

CO₂ capture with complex absorbent of ionic liquid and water

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