저농도 이산화탄소 포집을 위한 초미세 탄소섬유 흡착제 제조 연구

• Published in: 한국대기환경학회지 Vol. 33; no. 1; pp. 1 - 10
• Main Authors: 김동우(Dong Woo Kim), 정동원(Dong Won Jung), 조영민(Young Min Jo)
• Format: Journal Article
• Language: Korean
• Published: 한국대기환경학회 2017
• Subjects: 대기과학; Electrospinning; Nanofiber; ACF; Adsorption; Carbon dioxide
• ISSN: 1598-7132; 2383-5346
• DOI: 10.5572/KOSAE.2017.33.1.001

Adsorption is a plausible technology using solid adsorbents for dry capture of carbon dioxide ($CO_2$). In general, narrow size distribution of tiny pores and surface chemical functionalities of solid adsorbents enhance the adsorption capacity of gaseous $CO_2$ molecules. In order to utilize the advantages of fibrous adsorbents, this work prepared activated carbon nanofibers (ACNFs) via the electrospinning process using a polymer precursor of polyacylonitrile (PAN). The spun fibers were 390 nm to 580 nm in thickness with an average surface area of $27.3m^2/g$. The surface structure was improved by a programmed thermal activation at $800^{\circ}C$ in $CO_2$ atmosphere. It was also found that the nitrogen-groups including pyrrole and pyridine were created during the activation facilitaing the selective adsorption as forming enhanced active sites. The finally obtained adsorption capacities were 2.74 mmol/g for pure $CO_2$ flow and 0.74mmol/g for 3000 ppm.