关键词: 山楂核, 活性炭, 炭化, 活化, 精制

Abstract: Abandoned hawthorn kernel was utilized for producing woody activated carbon in this work. The process conditions, including carbonization, activation and refine, were optimized. Results showed that, the condition,i.e., heating to 300 ℃ in 2 h, temperature kept for 1 h, and then heating to 600 ℃ in 3 h, was beneficial for ensuring the yield rate and strength of the carbonized material during carbonization process. The suitable carbonization condition was heated at 900-950 ℃ for 6h, and HCl amount was controlled at 10 % of the carbon during refining process. The activated carbon produced through carbonization and activation processes under the optimal condition had adsorption capacity of 1 100 mg/g for iodine, 180mg/g for methyl blue (MB), and strength 94%. It is able to meet the demand of general customers. Iron content decreased dramatically from 0.25% to 0.02% and ash content declined from 6% to 2% after washing with acid and water.

Key words: hawthorn kernel, activated carbon, carbonization, activation, refine