期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 303, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2022.122299
关键词
Porous carbon fiber; CO2 adsorption; K2CO3 activation; N-doping; Fiber morphology
资金
- Zhejiang Provincial Natural Science Foundation [LY21B070005]
- National Undergraduate Training Program for Innovation and Entrepreneurship of China
- Zhejiang Normal University [2021ZS06]
- TUBITAK [2247, 121C217]
- Osmaniye Korkut Ata University [OKUBAP-2020-PT2-002]
This study investigates the performance of nitrogen-doped porous carbon fibers in CO2 capture and separation. It is found that maintaining fibrous morphology, micro-mesoporous structure, and plentiful basic N-containing functionalities in the carbon framework contribute significantly to its outstanding CO2 capture performance.
Carbon dioxide capture and storage are considered a creative strategy for eliminating the catastrophic effect of global warming. The main concept in the present paper is to prepare nitrogen (N)-doping microporous carbon fibers and investigate their CO2 adsorption and separation process. Herein, N-doped porous carbon with an abundance of nitrogen groups (N doping > 15 wt%), a preserved fibril morphology, a BET surface area of 2434 m2/g together with a pore volume of 1.23 cm3 g-1 was produced from polyacrylonitrile fiber via chemical activation of K2CO3. The optimal porous carbon fiber sample has CO2 adsorption capacity of up to 3.83 and 5.84 mmol g-1 at 25 and 0 degrees C under 1 bar, respectively, a fast adsorption rate and high selectivity of the CO2 over N2. It has been found that the maintained fibrous morphology, the micro-mesoporous structure, and plentiful basic N-containing functionalities within the carbon framework all contribute to the outstanding CO2 capture performance.
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