Designing a green and efficient absorbent for CO_2 capture

查看全文 作　　者：DAI Yue,WANG Guannan,WU Youting,ZHANG Zhibing (Separation Engineering Research Center,School of Chemistry and Chemical Engineering, Nanjing University,Nanjing 210093,Jiangsu,China) 出　　处：《化工进展》索引2011年第30卷第S2期,共4页 基　　金：supported by the National Natural Science Foundation (21076101);Technological Support Project of Jiangsu Province(SBE 201000600) 摘　　要：Several task-specific ionic liquids(TSILs) with weak alkalinity have been designed based on tetraalkyl-ammonium cation and L-alanine anion([N₂₂₂₂][L-Ala]) for the CO₂ absorption.[N₂₂₂₂][L-Ala]has been chosen as a green and efficient activator for methyldiethanolamine(MDEA).The densities,viscosities and absorption properties of the equimolar[N₂₂₂₂][L-Ala]-MDEA blended absorbents were investigated.Low viscosity and density values support the idea that blended absorbents are preferred in the industrial applications.[N₂₂₂₂][L-Ala]-MDEA behave similarly to the aqueous counterparts but offer more advantages,such as large absorption capacities,fast absorption rate and relatively low damage to the environment. 关 键 词：task-specific IONIC liquid WEAK alkanility CO₂ CAPTURE BLENDED absorbents