ZnCl_2活化-稀酸高压蒸煮制备高比表面积秸秆活性炭  

Rice Straw-based High-specific-surface-area Activated Carbons Prepared by Combination of ZnCl_2 Activation and Boiled in Dilute Acid Solution

作　　者：黄大成[1] 邹亚娟[2] 金承钰[2] 许实[2] 王斌涛 王惠松 

机构地区：[1]上海工程技术大学工程实训中心,上海201620 [2]上海交通大学分析测试中心,上海200240 [3]嘉兴市环境保护监测站,浙江嘉兴314000

出　　处：《实验室研究与探索》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)

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.

关 键 词：稻草秸秆 氯化锌 活性炭 稀酸蒸煮 

分 类 号：TQ351[化学工程] TQ424