Sorption Performance towards No2 of Nitrogen-enriched Adsorbents Obtained from Sawdust Pine

Introduction Modification of the precursors or ready activated carbons permits getting materials of improved adsorption and catalytic properties or of specific acid-base or hydrophobic-hydrophilic character. Particularly promising are the activated carbons enriched in nitrogen because of wide possibilities of use of such materials. In particular, they can find applications related to protection of the natural environment, e.g. for low temperature selective catalytic reduction of NO, for removal of harmful exhaust gases, for adsorption of metal ions from the liquid phase and in electrochemistry for production of electrodes for electrochemical capacitors [1-6]. Nitrogen-enriched activated carbon can be produced from various precursors such as wood, plastics containing nitrogen in their structure and fossil coals of different degree of coalification, from brown coals to anthracites [7-8]. From the ecological point of view, N-enriched activated carbons obtained from waste materials such as sawdust or agricultural wastes make an excellent alternative to those produced from fossil fuels. It is a very interesting method of utilisation of wastes and their conversion into valuable products. For this reason the objective of this paper was to obtain adsorbents from sawdust pine, enrichment of the products in nitrogen in the reaction with urea and characterisation of the products adsorption capacities towards NO2, in dry and wet conditions.