Carbon, Volume 56, May 2013, Pages 139–145
Carbon dioxide activated carbide-derived carbon
monoliths as high performance adsorbents
Martin Oschatz (a), Lars Borchardt (a), Irena
Senkovska (a), Nicole Klein (b), Matthias Leistner (b), Stefan Kaskel (a,b)
a Department of Inorganic Chemistry, Dresden University of Technology,
Bergstraße 66, D-01062 Dresden, Germany
b Fraunhofer Institute for Material and Beam Technology, Winterbergstraße 28,
D-01277 Dresden, Germany
Abstract
Reports physical activation
of carbide-derived carbon (CDC) monoliths (DUT-38) with a distinctive macropore
network are using carbon dioxide as oxidizing agent. The procedure is conducted
in a temperature range between 850 and 975 °C with durations ranging from 2 to 6 h. Resulting materials exhibit
significantly increased specific surface areas as high as 3100 m2/g
and total micro and meso pore volumes of more than 1.9 cm3/g.
The methane, hydrogen, and n-butane storage capacities of the activated CDCs are considerably
higher than the non-activated reference material. In addition, carbon dioxide
activation is a suitable method for the removal of metal chlorides and chlorine
residuals adsorbed in the pores of CDC after high temperature chlorination.
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