High selectivity of TiC-CDC for CO2/N2 separation

Journal article

Publication Details

Author(s): Silvestre-Albero A, Rico-Frances S, Rodriguez-Reinoso F, Kern A, Klumpp M, Etzold B, Silvestre-Albero J
Journal: Carbon
Publication year: 2013
Volume: 59
Pages range: 221-228
ISSN: 0008-6223


A series of carbide-derived carbons (CDC) have been prepared starting from TiC and using different chlorine treatment temperatures (500--1200~°C). Contrary to N2 adsorption measurements at $-$196~°C, CO2 adsorption measurements at room temperature and high pressure (up to 1~MPa) together with immersion calorimetry measurements into dichloromethane suggest that the synthesized CDC exhibit a similar porous structure, in terms of narrow pore volume, independently of the temperature of the reactive extraction treatment used (samples synthesized below 1000~°C). Apparently, these carbide-derived carbons exhibit narrow constrictions were CO2 adsorption under standard conditions (0~°C and atmospheric pressure) is kinetically restricted. The same accounts for a slightly larger molecule as N2 at a lower adsorption temperature ($-$196~°C), i.e. textural parameters obtained from N2 adsorption measurements on CDC must be underestimated. Furthermore, here we show experimentally that nitrogen exhibits an unusual behavior, poor affinity, on these carbide-derived carbons. CH4 with a slightly larger diameter (0.39~nm) is able to partially access the inner porous structure whereas N2, with a slightly smaller diameter (0.36~nm), does not. Consequently, these CDC can be envisaged as excellent sorbent for selective CO2 capture in flue-gas streams.

FAU Authors / FAU Editors

Etzold, Bastian Prof. Dr.
Professur für Katalytische Materialien
Kern, Andreas
Lehrstuhl für Chemische Reaktionstechnik
Klumpp, Michael
Lehrstuhl für Chemische Reaktionstechnik

Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials

External institutions with authors

Universitat d'Alacant (UA) / University of Alicante

Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials

How to cite

Silvestre-Albero, A., Rico-Frances, S., Rodriguez-Reinoso, F., Kern, A., Klumpp, M., Etzold, B., & Silvestre-Albero, J. (2013). High selectivity of TiC-CDC for CO2/N2 separation. Carbon, 59, 221-228. https://dx.doi.org/10.1016/j.carbon.2013.03.012

Silvestre-Albero, Ana, et al. "High selectivity of TiC-CDC for CO2/N2 separation." Carbon 59 (2013): 221-228.


Last updated on 2019-16-03 at 12:10