Obtaining Activated Carbons from Hydrolysed Lignin Using Waste Products of the Carbonization Process

Abstract

Consideration has been given to obtain activated carbon from waste products of hazard class III which is hydrolyzed lignin. The possibility of obtaining microporous tenacious carbon sorbents based on lignin using waste products from the carbonization process was demonstrated. The dependence of the parameters of porous and microporous structures of activated carbons based on lignin on the technological features of the production process was assessed. Illustration of effect of introducing small amounts of inorganic additives into the feedstock using phosphoric acid as an example on the porous structure and adsorption properties of the resulting activated carbons. The influence of advanced activation on the number of specific pores was demonstrated. The burning optimal degree of activated carbons from a specific raw material was identified to obtain a sorbent with a developed micropore structure and tenacity equal to the commercial activated carbons.