Preparation and CO2 Sorption/Desorption of N-(3-Aminopropyl)Aminoethyl Tributylphosphonium Amino Acid Salt Ionic Liquids Supported into Porous Silica Particles
Preparation and CO2 Sorption/Desorption of N-(3-Aminopropyl)Aminoethyl Tributylphosphonium Amino Acid Salt Ionic Liquids Supported into Porous Silica Particles
复制标题
DOI：
10.1021/ie2028415
复制
发表时间：
2012-05
影响因子：
4.2
通讯作者：
Jie Ren;Linbo Wu;Bo-geng Li
中科院分区：
文献类型：
--
作者：
Jie Ren;Linbo Wu;Bo-geng Li
为了寻找稳定的CO2捕集材料，合成了N-（3-氨丙基）氨乙基三丁基鏻氨基酸盐（[apaeP 444][AA]）型任务特异性离子液体（TSILs），并通过简单的吸附-蒸发法将其固定在多孔硅胶载体上.离子液体和由此制备的吸附剂，Sorb-AA，进行了表征，并在温度和真空摆动条件下的CO2吸附和解吸行为进行了研究。IL/SiO_2重量比可达1/1。在IL负载后，吸附剂保持相当高的比表面积和孔隙率，因此表现出快速的吸附和解吸速率以及优异的吸附容量和选择性，并且可以重复使用。其中，Sorb-Lys具有最高的CO2吸附能力。它可以捕获1.54 mmol或67.9毫克CO2每克吸附剂从模拟烟气中含有14%的CO2在每个周期的吸附和解吸。Sorb-Gly的CO2吸附量略低。
To search for robust CO2 capture materials, several N-(3-aminopropyl)aminoethyl tributylphosphonium amino acid salts ([apaeP444][AA])-type task specific ionic liquids (TSILs) were synthesized and immobilized into porous silica support through a facile impregnation–vaporization method. The ILs and thus prepared sorbents, Sorb-AA, were well characterized, and their CO2 sorption and desorption behaviors under temperature- and vacuum-swing conditions were investigated. The ILs can be immobilized facilely into silica up to 1/1 IL/SiO2 weight ratio. After IL loading, the sorbents retain reasonably high specific surface area and porosity and therefore exhibit rapid sorption and desorption rates as well as excellent sorption capacity and selectivity and can be used repeatedly. Among them, Sorb-Lys has the highest CO2 sorption capacity. It can capture 1.54 mmol or 67.9 mg CO2 per gram sorbent from a simulated flue gas containing 14% CO2 in each cycle of sorption and desorption. Sorb-Gly has slightly less CO2 sorpt...