Highly active carbons on base of biomass waste - NUT shells

Abstract

The research is devoted to obtaining of highly porous activated carbons from apricot stones and pistachio, hazelnut, walnut shells from various regions using thermocatalytic activation with sodium hydroxide. Influence of the raw material properties and origin, as well as the precursor to activator ratio on a porous structure was studied. It was found that at activation temperature 700 ºC and NaOH to carbonizate ration 2:1 and 3:1 a highly developed porous structure is being formed, which can be controlled altering meso- and micropores volumes. It is demonstrated that the highest porosity was achieved in the case of walnut shells and apricot stones, and the obtained materials can be used for sorption and as electrodes in supercapacitors, fuel cells and Li-ion batteries.