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논문 기본 정보

자료유형
학술대회자료
저자정보
Minkee Choi (Korea Advanced Institute of Science and Technology) Woosung Choi (Korea Advanced Institute of Science and Technology) Kyungmin Min (Korea Advanced Institute of Science and Technology)
저널정보
한국에너지기후변화학회 한국에너지기후변화학회 학술대회 한국에너지기후변화학회 2017년도 춘계학술대회 초록집
발행연도
2017.5
수록면
156 - 165 (10page)

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Amine-functionalized porous materials have been extensively investigated as promising approach for post-combustion CO₂ capture due to their chemisorption of low-concentration CO₂ (ca. 15%) from a flue gas. However, earlier studies mainly focused on the improvement of CO₂ uptake capacities of adsorbents, and did not demonstrate practical adsorbent regeneration processes and long-term stabilities. Here we design a cost-effective and scalable synthesis of modified-polyethyleneimine/silica composite adsorbent that can simultaneously show a large CO₂ working capacity as well as outstanding stability in a practically meaningful temperature swing adsorption (TSA) condition (adsorbent regeneration under 100% CO₂ at 120 ℃) even without the intensive use of steam. Most importantly, it is first reported that controlled modification of polyethyleneimine (PEI) with epoxide-derivatives markedly reduces the heat of CO₂ adsorption and facilitates CO₂ desorption (>99%) compared to unmodified PEI (76%) during the adsorbent regeneration. The modification also assures long-term adsorbent stability over repeated TSA cycles due to remarkable suppression of CO₂-induced urea formation and oxidative amine degradations.

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Abstract
Introduction
Experiment
Results and Conclusion
Conclusion
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