树脂基固态胺吸附材料的选择性CO_(2)吸附性能  

Selective CO2 adsorption performance of resin-based solid amine adsorbents

作　　者：孟园 林莉 陈哲红 沈鹏飞 鞠彤瑶 王婧玥 蒋建国[1] MENG Yuan;LIN Li;CHEN Zhe-hong;SHEN Peng-fei;JU Tong-yao;WANG Jing-yue;JIANG Jian-guo(School of Environment,Tsinghua University,Beijing 100084,China;China Tiegong Investment&Construction Group Co.,Ltd,Beijing 101300,China)

机构地区：[1]清华大学环境学院,北京100084 [2]中国铁工投资建设集团有限公司,北京101300

出　　处：《中国环境科学》2022年第9期4343-4350,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(22176108)。

摘　　要：基于简单的湿浸渍法将聚乙烯亚胺(PEI)有效负载到多孔树脂(HP20)中,制备获得树脂基固态胺吸附材料,并探究了PEI负载量(30%~60%)、吸附温度(30~90℃)和压力(2~100kPa)对材料CO_(2)吸附性能的影响.研究表明树脂基固态胺吸附材料的最佳PEI负载量为50%,过量的PEI会致使材料CO_(2)吸附容量和胺基利用效率的显著降低.所筛选的材料在较低或较高的CO_(2)分压范围内均能展现出优异的CO_(2)吸附性能,在30℃下的CO_(2)吸附容量达到3.06~3.78mmol/g,表明该材料在不同CO_(2)分压的多种碳捕集应用中均有着较好的适用性.此外,树脂基固态胺吸附材料的CO_(2)/CH4和CO_(2)/N2选择性在2~100kPa的压力范围内分别有262~5858和708~11551,在各类传统或新兴的固体吸附材料中处于较高水平.In this work,resin-based solid amine adsorbents were obtained by effectively functionalizing polyethyleneimine(PEI)into porous resin(HP20)using a simple wet impregnation method.The effects of PEI loading(30%~60%),adsorption temperature(30~90℃)and pressure(2~100kPa)on the CO_(2)adsorption performance of the adsorbents were investigated.It was shown that the optimum PEI loading for the adsorbents was 50%,and that excess PEI resulted in a significant decrease in CO_(2)adsorption capacity and amine utilization efficiency.The screened adsorbents exhibited excellent CO_(2)adsorption performance at both low and high CO_(2)partial pressures,with CO_(2)adsorption capacities ranging from 3.06 to 3.78mmol/g at 30℃,indicating that resin-based solid amine adsorbents were suitable for different CO_(2)capture applications at various CO_(2)partial pressures.In addition,the CO_(2)/CH4 and CO_(2)/N2 selectivity of resin-based solid amine adsorbents ranged from 262 to 5858 and from 708 to 11551 at 2~100kPa,respectively,which were at a high level among various traditional and emerging solid adsorbents.

关 键 词：碳捕集 固态胺 多孔树脂 CO_(2)吸附性能 选择性 

分 类 号：X22[环境科学与工程—环境科学]