id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
eurjchem-1555	Vargas-Delgadillo, Diana Paola; Giraldo, Liliana; Moreno-Pirajan, Juan Carlos	Preparation and calorimetry characterization of nitrogen-enriched activated carbons and their application in the removal of carbon dioxide	2017	7	.pdf	application/pdf	5391	261	54	Functionalization of surface has been made by the reactions of carbon with ammonia, urea or amines, other alternatives are the use of rich in nitrogen plastics as carbon precursors and impregnation of carbons with solutions of amines or covering the surface with a layer of nitrogen‐ containing polymer [10,14,15]. The oxygen content has increased, mainly in samples functionalized with gaseous ammonia, this tendency has shown in similar studies [37‐39], where surface of two commercial activated carbons (Norit R is studied and C) and activated carbon fibers was modified with ammonia in order to improve the CO2 adsorption capacity of solids, this work stablishes that with the high temperature treatment a lot of oxygenated groups on surface materials are removed, however after functionalization remain unsaturated carbon atoms in the porous solid, able of being combined in varying proportion with other heteroatoms such as oxygen, generating a new surface chemistry on the activated carbons	cache/eurjchem-1555.pdf	txt/eurjchem-1555.txt