整体
吸附
胺气处理
介孔材料
介孔二氧化硅
解吸
化学工程
材料科学
硅胶
化学
催化作用
色谱法
有机化学
工程类
作者
Yiying Zhao,Jizhi Zhou,Lili Fan,Lin Chen,Li Li,Zhi Ping Xu,Guangren Qian
标识
DOI:10.1021/acs.iecr.9b03338
摘要
Amine-functionalized adsorbents have attracted much attention in removing indoor CO2 to reduce the risk of human health. In the current work, polyethyleneimine (PEI)-modified silica monolith (PEIx-silica) was synthesized through a sol–gel method using PEI with molecular weights of 750,000, 25,000, and 10,000 as template agents. The N2 adsorption result revealed that the PEIx-silica monolith possesses a mesoporous structure with 25–45 nm pore size assembled by silica particles (60–80 nm), which was decreased with the decrease in PEI molecular weight. The adsorption capacities of PEIx-silica for reducing CO2 concentration below 0.1% from 0.5% were investigated. The results indicated that CO2 adsorption capacity of PEIx-silica increased as molecular weight of PEI decreased. PEI10,000-silica achieved CO2 adsorption capacities of 58.5 and 100.4 mg g–1 under dry and humid conditions and showed cyclic stability during a 10 times adsorption–desorption process. Therefore, PEIx-silica monolith provides a promising strategy for controlling indoor CO2.
科研通智能强力驱动
Strongly Powered by AbleSci AI