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%。
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 HC1 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.
出处
《生物质化学工程》
CAS
2013年第2期19-22,共4页
Biomass Chemical Engineering
基金
林业公益性行业专项(201004051)
关键词
山楂核
活性炭
炭化
活化
精制
hawthorn kernel
activated carbon
carbonization
activation
refine
