期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 25, 页码 21213-21223出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b01749
关键词
CO2 capture; polyethyleneimine; amine modification; double-layer structure; stability
资金
- Super Ultra Low Energy and Emission Vehicle Engineering Research Center of the National Research Foundation of Korea (NRF) - Korean Government (Ministry of Science, ICT and Future Planning) [NRF-2016R1A5A1009592]
- Korea Institute of Energy Research [B7-2424]
CO2 capture using polyethyleneimine (PEI)-impregnated silica adsorbents has been receiving a lot of attention. However, the absence of physical stability (evaporation and leaching of amine) and chemical stability (urea formation) of the PEI-impregnated silica adsorbent has been generally established. Therefore, in this study, a double-layer impregnated structure, developed using modified PEI, is newly proposed to enhance the physical and chemical stabilities of the adsorbent. Epoxy-modified PEI and diepoxide-crosslinked PEI were impregnated via a dry impregnation method in the first and second layers, respectively. The physical stability of the double-layer structured adsorbent was noticeably enhanced when compared to the conventional adsorbents with a single layer. In addition to the enhanced physical stability, the result of simulated temperature swing adsorption cycles revealed that the double-layer structured adsorbent presented a high potential working capacity (3.5 mmol/g) and less urea formation under CO2-rich regeneration conditions. The enhanced physical and chemical stabilities as well as the high CO2 working capacity of the double-layer structured adsorbent were mainly attributed to the second layer consisting of diepoxide-cross-linked PEI.
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