| 학회 | 한국화학공학회 |
| 학술대회 | 2016년 가을 (10/19 ~ 10/21, 대전컨벤션센터) |
| 권호 | 22권 2호, p.1780 |
| 발표분야 | 분리기술 |
| 제목 | Epoxide-Functionalization of Polyethyleneimine for Scalable Synthesis of Extra-Stable CO2 Adsorbent in Temperature Swing Adsorption |
| 초록 | Amine-containing adsorbents have been extensively investigated for post-combustion CO2 capture due to their ability to chemisorb low-concentration CO2 from a wet flue gas. However, earlier studies have focused primarily on the CO2 uptake of adsorbents, and have not demonstrated effective adsorbent regeneration and long-term material stability under such conditions. Here we report the highly versatile and scalable synthesis of a functionalized-polyethyleneimine/silica adsorbent which simultaneously exhibits a large CO2 working capacity (2.2 mmol/g) and long-term stability in a practical temperature swing adsorption (TSA) process, enabling the separation of concentrated CO2. We demonstrate that the functionalization of polyethyleneimine (PEI) with 1,2-epoxybutane reduces the heat of CO2 adsorption and facilitates CO2 desorption (＞99%) during regeneration compared to unmodified PEI (76%). Most notably, the functionalization dramatically improves long-term adsorbent stability over repeated TSA cycles due to the great suppression of urea formation and oxidative amine degradation. |
| 저자 | 최우성, 최민기 |
| 소속 | KAIST |
| 키워드 | 흡착; 온실가스 분리 |
| 원문파일 | 초록 보기 |
