Alcañiz-Monge, Juan, Bueno López, Agustín, Lillo-Rodenas, Maria Angeles, Illán-Gómez, María José
NO adsorption on activated carbon fibers from iron-containing pitch
ALCAÑIZ MONGE, Juan, et al. "NO adsorption on activated carbon fibers from iron-containing pitch". Microporous and Mesoporous Materials. Vol. 108, Issues 1-3 (1 Febr. 2008). ISSN 1387-1811, pp. 294-302
URI: http://hdl.handle.net/10045/8191
DOI: 10.1016/j.micromeso.2007.04.011
ISSN: 1387-1811
Abstract: 
Iron-containing activated carbon fibers (Fe-ACF) have been prepared by a novel method consisting of mixing an iron precursor with
raw pitch before carbon fiber formation, and further CO2 activation of the Fe-CF. The NO adsorption experiment revealed that iron
species are accessible to gases and that they activate NO improving adsorption into the fiber microporosity. The chemisorption of
NO and the subsequent dimer (N2O2) formation is, in general, the rate-limiting step. Metallic iron and/or partially reduced iron compounds
are the most active iron species. However, in the fibers with narrow micropores dimer diffusion in the microporosity is the slowest
step and, consequently, an appropriate pore size is required from a kinetic point of view. The most suitable samples prepared were those
with pores wider than 0.7 nm which contain partially reduced iron species. Finally, NO adsorbed can be further recovered by heating the
spent adsorbents at a quite low temperature (500 K). Fresh and regenerated adsorbents show similar NO adsorption capacity.
Keywords:Microporosity, NO adsorption, Thermal analysis
Elsevier
info:eu-repo/semantics/article