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- W2808713441 abstract "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-cross-linked 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." @default.
- W2808713441 created "2018-06-21" @default.
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- W2808713441 date "2018-06-18" @default.
- W2808713441 modified "2023-09-29" @default.
- W2808713441 title "Double-Layer Structured CO<sub>2</sub> Adsorbent Functionalized with Modified Polyethyleneimine for High Physical and Chemical Stability" @default.
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- W2808713441 doi "https://doi.org/10.1021/acsami.8b01749" @default.
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- W2808713441 hasPublicationYear "2018" @default.
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