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CO 2 /N 2 Separation on Highly Selective Carbon Nanofibers Investigated by Dynamic Gas Adsorption
Author(s) -
Selmert Victor,
Kretzschmar Ansgar,
Weinrich Henning,
Tempel Hermann,
Kungl Hans,
Eichel RüdigerA.
Publication year - 2022
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202200761
Subject(s) - polyacrylonitrile , carbonization , adsorption , carbon nanofiber , electrospinning , chemical engineering , selectivity , materials science , nanofiber , selective adsorption , carbon fibers , nanotechnology , chemistry , organic chemistry , catalysis , carbon nanotube , composite material , polymer , engineering , composite number
The development of highly selective adsorbents for CO 2 is a key part to advance separation by adsorption as a viable technique for CO 2 capture. In this work, polyacrylonitrile (PAN) based carbon nanofibers (CNFs) were investigated for their CO 2 separation capabilities using dynamic gas adsorption. The CNFs were prepared by electrospinning and subsequent carbonization at various temperatures ranging from 600 to 1000 °C. A thorough investigation of the CO 2 /N 2 selectivity resulted in measured values of 53–106 at 1 bar and 25 °C on CNFs carbonized at 600, 700, or 800 °C. Moreover, the selectivity increased with lower measurement temperatures and lower CO 2 partial pressures, reaching values up to 194. Further analysis revealed high long‐term stability with no degradation over 300 cycles and fast adsorption kinetics for CNFs carbonized at 600 or 700 °C. These excellent properties make PAN‐based CNFs carbonized at 600 or 700 °C promising candidates for the capture of CO 2 .