摘要
以辣椒秸秆制备活性炭,采用正交实验法,选取炭化温度、炭化时间、升温速率为影响因子,以比表面积、炭得率为评价指标确定最优炭化工艺,对最优条件下所制活性炭的孔结构及表面化学性质进行了表征.结果表明,最优炭化工艺为炭化温度400℃,炭化时间50 min,升温速率5℃/min;该条件下所制活性炭的炭得率为39.90%,BET比表面积为966.003 m^2/g,吸附总孔容为0.544 cm^3/g,平均孔径为2.252 nm;且表面存在丰富的孔隙结构及酚、醇羟基、羧基、醚基等官能团.
The activated carbon was prepared by capsicum straw as the research object.The carbonization temperature,carbonization time and heating rate were taken as the influencing factors,and the specific surface area and char yield were taken as the test indexes of orthogonal experiment.The pore structure and surface chemical properties of activated carbon were characterized,which was prepared under the optimum carbonization process.The results showed that the optimum carbonization conditions were as follows： the carbonization temperature of 400 ℃,coking time of 50 min,heating rate of 5 ℃/min.Under these conditions,the char yield of activated charcoal was 39.900%,the BET specific surface area was 966.003 m^2/g,the total pore volume was 0.544 cm^3/g and the average pore diameter was 2.252 nm.Besides,rich pore structure and the functional groups such as phenol,alcohol hydroxyl,carboxyl,ether etc.existed in the surface of activated carbon.
出处
《过程工程学报》
CAS
CSCD
北大核心
2017年第5期1066-1071,共6页
The Chinese Journal of Process Engineering
基金
陕西省科技厅工业公关项目(编号:2014k10-08)
陕西省教育厅服务地方专项计划项目(编号:16JF010)
西安市科技计划项目[编号:CXY1517(2)]
关键词
辣椒秸秆
炭化
活性炭
比表面积
capsicum straw
carbonization
activated carbon
specific surface area
