γ-Al_2O_3负载型多胺基离子液体对CO_2的吸附特性  

Adsorption characteristics of γ-Al_2O_3-supported poly-amino based ionic liquid on CO_2

作　　者：杨旗[1,2] 胡辉[1] 夏琪[1] 李芳[1] 操火锋 

机构地区：[1]华中科技大学环境科学与工程学院,湖北武汉430074 [2]武昌首义学院城市建设学院,湖北武汉430064

出　　处：《应用化工》2016年第1期1-6,共6页Applied Chemical Industry

基　　金：国家科技支撑计划(2012BAC18B02);华中科技大学自主创新基金重点专项(HUST:2014NY003)

摘　　要：以γ-Al_2O_3载体,采用浸渍-蒸发法制备负载型多胺基离子液体(X[BF_4]/γ-Al_2O_3,X=[EDTAH]、[DETAH]、[TETAH]、[TEPAH]),以CO_2摩尔吸附量和平均CO_2吸附速率为评价指标,优选出对CO_2吸附效果最优的[TETAH][BF_4]/γ-Al_2O_3负载型离子液体,其对CO_2的吸附容量和平均吸附速率分别达到0.886 mmol CO_2/(g·SILs)和5.907×10^(-2)mmol CO_2/[(g·SILs)·min],进一步考察在不同温度、气体流量和负载比条件下该负载型离子液体对CO_2的吸附特性。结果表明,多胺基离子液体和载体共同影响着负载型离子液体对CO_2的吸附性能;[TETAH][BF_4]/γ-Al_2O_3吸附CO_2的最佳条件为负载比0.5:1~1:1、气体流量100 mL/min、温度60℃。γ-Al_2O_3-supported poly-amino based ionic liquids i. e.,[EDTAH][BF_4]/γ-Al_2O_3,[DETAH][BF_4]/γ-Al_2O_3,[TETAH][BF_4]/γ-Al_2O_3,and [TEPAH][BF_4]/γ-Al_2O_3,were prepared by impregnation-evaporation method. Based on evaluation indexs of the CO_2 mole adsorption capacity and the average CO_2 adsorption rate,[TETAH][BF_4]/γ-Al_2O_3 supported ionic liquid which had superior characteristics was selected,which the absorption capacity and the average adsorption rate of CO_2is0. 886 mmol CO_2/（ g SILs） and 5. 907 × 10^（-2）mmol CO_2/ [（ g SILs） ·min],respectively. The adsorption characteristics of [TETAH][BF_4]/γ-Al_2O_3 on CO_2under different temperature,gas flow rate and load ratio were further investigated. The results show that CO_2 adsorption performance of supported ionic liquid is affected by both poly-amino based ionic liquid and support. The optimal CO_2 adsorption condition is 0. 5∶ 1 ～ 1∶ 1 of load ratio,100 mL/min of gas flow rate,and temperature at 60 ℃.

关 键 词：负载型多胺基离子液体 CO_2 吸附 影响因素 

分 类 号：TQ028.3[化学工程]