Preparation of Activated Carbon of Lignin from pulping

Activated carbon was prepared using lignin from pulping with phosphoric acid by carbonization and activation,the parameters were optimized.The activated carbon's Absorption competence of methylene blue was 8.6mL/0.lg after the three factors are optimized: activated temperature 500℃,reagent ratio4.5∶ l,activated time 10min,and the yield of activated carbon was 31.25%.Finally the properties of activated carbon were characterized,including structure and property of surface,elemental composition,specific surface area and pore size distribution.