Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 25, Pages 21213-21223Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b01749
Keywords
CO2 capture; polyethyleneimine; amine modification; double-layer structure; stability
Funding
- 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]
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available