期刊
CHEMICAL ENGINEERING JOURNAL
卷 413, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127532
关键词
Micro-mesoporosity; Hydrophilicity; Direct air capture; CO2 sorption; Sorption kinetics
资金
- National Natural Science Foundation of China [51676169]
- Zhejiang Provincial Natural Science Foundation of China [LR19E060002]
- UNCAGE ME, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DESC0012577]
A new design approach for QA-based polymeric sorbents was proposed to enhance CO2 capture efficiency through porosity control and hydrophilicity modulation. Experimental results showed that optimized structure can make the sorbents adaptive to varied and complex atmospheric circumstances.
Quaternary ammonium (QA)-based polymeric sorbents are known to be effective for CO2 capture, especially from ultradilute streams like air. In this work, we address two major challenges in QA sorbent design for application in moisture-swing processes, porosity control and hydrophilicity modulation. Facilely substituting porous CO2-active components for non-porous ones can enhance the sorption kinetics by 4-fold compared to the state-of-art, and micro-mesoporous structures are identified as optimal porous structures. A method to modulate the hydrophilicity of QA-based sorbents is developed using controlled radical polymerization, incorporating fluorine-containing monomers. The CO2 sorption capacity and the tolerance towards moisture are simultaneously enhanced via adjustment of the structure and the content of fluorine-containing blocks. We postulate that porosity and hydrophilicity optimization can make QA-based sorbents adaptive to deployment of scalable moisture-swing processes in varied and complex atmospheric circumstances.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据