【摘要】 利用废弃的山楂核为原料生产木质颗粒活性炭,并对活性炭生产过程中炭化、活化及精制步骤的工艺条件进行了优化。实验结果表明在炭化过程中,采用2h内缓慢升温至300℃,并维持1h,而后在3h内升温至600℃的炭化方式有利于保证炭化料的得率和强度;活化温度900～950℃,活化时间6h为宜;精制过程中盐酸用量是炭质量的10%为宜。在优化条件下经过炭化和活化制成的活性炭碘值可达1100mg/g,亚甲基蓝吸附值可达180mg/g,强度可达94%,能够满足一般用户的需求。产品通过酸洗和漂洗之后可使铁盐的含量由0.25%降至0.02%,灰分由6%降至2%。更多还原

【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.更多还原