摘要
以剑麻纤维废弃物为原料,磷酸法活化制备了高吸附性能活性炭,考察了磷酸质量分数、磷酸与原料浸渍比、活化温度和活化时间4个因素对活性炭吸附性能的影响。采用比表面积及孔隙度分析仪、热重分析仪(TG)和扫描电子显微镜(SEM)对活性炭样品进行表征。结果表明,影响活性炭吸附性能的因素按重要性排序,依次是活化温度>活化时间>磷酸质量分数>浸渍比。最佳制备工艺为:磷酸质量分数50%,磷酸与原料质量浸渍比1.5∶1,活化温度400℃和活化时间70 min,该条件下制备的活性炭BET比表面积达1877 m^(2)/g,总孔容积1.87 cm3/g,平均孔径4.0 nm,亚甲基蓝吸附值(QMB)225 mg/g,碘吸附值(QI2)1051.1 mg/g,得率35%。
High absorption performance activated carbons were prepared from sisal fiber waste by phosphoric acid activation.The inference of mass fraction(c.a(H3PO4)),impregnation ratio,activation temperature and heating time on adsorption properties of activated carbons were investigated.The obtained activated carbons were characterized by Nitrogen adsorption—desorption iso—therms,thermo—gravimetry(TG)and scanning electron microscope(SEM).It was found that the order of fact0rs that influence adsorption properties was:activation temperature>activation duration time>60(I-I3PO4)>impregnation ratio.The optimal pre—treatment and activation conditions are:(H3PO4)50%,impregnation ratio 1.5:1,activation temperature 400 cc and heating time 70rain.The yield of the activated carbon is 35%with the properties of the sample is as follow:specific surface area(SBET)1877 m/g,total pore volume 1.87 cm/g,average pore diameter 4.0 nm,iodine number(QI)1051.1 mg/g,amount of methylene blue adsorption(QMB)225 mg/g.
作者
谢新苹
蒋剑春
孙康
卢辛成
XIE Xin-ping;JIANG Jian-chun;SUN Kang;LU Xin-cheng(Institute of Chemical Industry of Forest Products,CAF;National Engineering Lab.for Biomass Chemical Utilization;Key and Open Lab.of Forest Chemical Engineering,SFA;Key Lab.of Biormass Energy and Material,Jiangsu Province,Nanjing 210042,China;Institute of New Technology of Forestry,CAF,Beijing100091,China)
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2013年第3期105-109,共5页
Chemistry and Industry of Forest Products
基金
国家林业局林业公益性行业专项(201004051)
'十二五'农村领域国家科技计划项目(2012BAD30B0204)
关键词
活性炭
磷酸活化法
剑麻纤维
中孔发达
activated carbon
phosphoric acid activation
sisal fiber
well—developed mesopores
作者简介
谢新苹(1987-),女,山东滨州人,硕士生,研究方向为炭质吸附材料制备与应用,E-mall:xiexinping-000@163.com;通讯作者:蒋剑春(1955-),男,研究员,博士,博士生导师,主要从事生物质能源和炭材料研究开发工作,E-mail:bio-energy@163.com。
