N-enriched ACF from coal-based pitch blended with urea-based resin for CO2 capture

N-enriched activated carbon fibers were successfully prepared from a coal derived pitch blended with urea-formaldehyde resin. The mixture was melt-spun, stabilized, carbonized and activated with KOH, giving rise to microporous carbon fibers with high nitrogen content (up to 2.2%). Nitrogen functional groups were mostly identified as quaternary N, and the content in this nitrogen group decreased with the degree of activation. N-enriched fibers activated under mild conditions (KOH/fiber = 5/1) showed the highest CO2 uptake (3.4 mmol CO2 g-1 at 25 °C and 1 atm). Due to their high alkalinity, the N-enriched fibers showed high CO2 adsorption rates and good selectivities for CO2/N2 and CO2/CH4 separation. After saturation with CO2, the fibers could be easily regenerated and maintained their performance over several adsorption-desorption cycles.

Bibliographic Details

Main Authors:	Díez Nogués, Noel, Álvarez Rodríguez, Patricia, Granda Ferreira, Marcos, Blanco Rodríguez, Clara, Santamaría Ramírez, Ricardo, Menéndez López, Rosa María
Other Authors:	Research Fund for Coal and Steel
Format:	artículo biblioteca
Language:	English
Published:	Elsevier 2015-07-01
Subjects:	Nitrogen, Carbon fibers, CO2 capture, Ensure access to affordable, reliable, sustainable and modern energy for all, Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation,
Online Access:	http://hdl.handle.net/10261/345554 https://api.elsevier.com/content/abstract/scopus_id/84926173787
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