木屑液化剩余物制备活性炭的探索研究  

Exploration research on activated carbon from sawdust liquefaction residue

作　　者：杨中志[1,2,3,4] 蒋剑春[1,2,3,4] 徐俊明[1,2,3,4] 谢新苹[1,2,3,4] 简相坤 张天健[1,2,3,4] 许玉 

机构地区：[1]中国林业科学研究院林产化学工业研究所 [2]生物质化学利用国家工程实验室 [3]国家林业局林产化学工程重点开发实验室 [4]江苏省生物质能源与材料重点实验室,江苏南京210042

出　　处：《炭素技术》2013年第2期11-15,共5页Carbon Techniques

基　　金：林业公益性行业科研专项经费项目(201204801)

摘　　要：以木屑加压液化的固体剩余物为原料,分别用磷酸、水蒸气为活化剂,详细考察两种制备方式所得活性炭在得率、性能上的特性。研究结果显示,两种制备方法均得到高收率的活性炭产品,其中磷酸法得率为69.8%,水蒸气法得率为37.3%。在所制备的活性炭微观结构上,磷酸法活性炭表现出较集中的孔径分布,通过N2吸附-脱附表征,其平均孔径为1.99 nm,比表面积1 255 m2/g;而水蒸气法活性炭孔径分布比较分散,微孔、中孔呈现连续式的分布状态,平均孔径为2.46 nm,比表面积665 m2/g,N2吸附-脱附等温线在高相对压力时出现滞后回环。Activated carbon was prepared from solid residue of sawdust liquefaction by phosphoric acid activation and steam activation, respectively. The yield and properties of the two activated carbons were investigated detailedly. The result showed that the two methods can prepare activated carbon with high yield. The yield of activated carbon from phosphoric acid method is 69.8%, whilefrom steam method is 37.3%. The activated carbon with phosphoric acid activation appears intensive pore width distribution on the microstructure. Through analysis of nitrogen adsorption and desorption isotherm, its average pore diameter is 1.99 rim, BET surface area is 1 255 m2/g. Pore width distribution of activated carbon with steam activation is scattered. The micropore and mesopore exhibit continuous distribution-with average pore diameter of 2.46 nm, BET surface area of 665 m2/g. Nitrogen adsorption and desorption isotherm appears lag circle in high relative pressure.

关 键 词：木屑 液化残渣 活性炭 磷酸 水蒸气 孔径分布 

分 类 号：TQ424.14[化学工程]