摘要
以秸秆木质素为原料,ZnCl_2为活化剂,将两者干法混合均匀后活化制备木质素基活性炭。通过单因素实验和Box-Behnken响应面实验得到高中孔率木质素基活性炭的最佳制备工艺条件为:盐料比1.5∶1,活化温度850℃,活化时间为60 min。该条件可使活性炭亚甲基蓝吸附值达到423.6 mg/g,比表面积达1224.38 m^2/g,平均孔径17.13 nm,总孔容2.165 cm^3/g,中孔孔容1.587 cm^3/g,中孔率达73.3%。
The activated carbon was prepared from lignin from wheat straw by zinc chloride activation. Before activation,the zinc chloride and lignin were mixed directly without binder or water. Three factors including zinc chloride/lignin ratio,activation temperature and activation time on adsorption properties of the activated carbon were studied through single factor experiment. On this basis,the best level of the main factors is determined by the Box-Behnken response surface methodology. The results showed that the optimum conditions were salt mass ratio of 1.5∶1,activation temperature 850 ℃,activation time 60 min. The activated carbon prepared under the optimized conditions had a methylene blue adsorption value of 423.6 mg/g,a BET surface area of 1224.38 m2/g and the average pore diameter of17.13 nm. The total pore volume of the activated carbon was 2.165 cm^3·g^-1 with a mesopore volume of 1.587 cm^3/g,yielding a high mesopore percentage of 73.3%.
作者
田龙
Tian Long(College of Life Science and Technology,Nanyang Normal University,Nanyang 463061,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第3期877-883,共7页
Acta Energiae Solaris Sinica
基金
南阳师范学院高层次人才科研启动费(ZX2015017)
关键词
生物质
活性炭
木质素
吸附
biomass
activated carbon
lignin
adsorption
