TY - JOUR TI - High selectivity of TiC-CDC for CO2/N2 separation AU - Silvestre Albero, Ana AU - Rico Francés, Soledad AU - Rodríguez Reinoso, Francisco AU - Kern, Andreas M. AU - Klumpp, Michael AU - Etzold, Bastian J.M. AU - Silvestre-Albero, Joaquín DA - 2013-08 UR - http://hdl.handle.net/10045/39538 AB - 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. KW - High selectivity KW - TiC-CDC KW - CO2/N2 separation DO - 10.1016/j.carbon.2013.03.012 SN - 0008-6223 (Print) PB - Elsevier ER -