摘要
实验采取了ZnCl2活化-稀酸高压蒸煮方法,以提高活化剂对前驱体的浸渍效率,并有效提高所制秸秆活性炭的比表面积。首先采用稀酸蒸煮处理秸秆,削弱秸秆纤维间的黏结,实现ZnCl2在秸秆纤维间的有效渗透。经上述处理后的前驱体再经600℃的炭化-活化工艺,制备得到最终活性炭材料,经工艺优化后,所得活性炭最高比表面积可达1628 m^2/g。进一步探讨稀酸蒸煮条件对活性炭制备的影响。最小二乘拟合计算表明,在162～180℃,蒸煮时间10～23 min,可以稳定得到比表面积大于1500 m^2/g的活性炭。
Rice straw-based activated carbon with high specific surface area was prepared by combination of ZnCl2 activation and hydrolysis in dilute acid solution. Treated by dilute acid,the inter-cellulose bonds were weakened,and ZnCl2 could favore impregnation and activation. The highest specific surface area of prepared activated carbon was 1 628m^2/ g. By using the least square method,manufacture activated carbon with specific surface area is higher than 1 500m^2/ g,under the conditions that boiling temperature is 162—180℃ and the treatment time is 10—23 minutes.
出处
《实验室研究与探索》
CAS
北大核心
2015年第6期31-33,154,共4页
Research and Exploration In Laboratory
基金
浙江省环保厅支持项目(2013B016)
关键词
稻草秸秆
氯化锌
活性炭
稀酸蒸煮
rice straw
zinc chloride
activated carbon
boiling treatment
