木质颗粒活性炭的孔结构对丁烷吸附性能的影响研究  

Effects of Pore Structure of Granular Activated Carbon on n-Butane Adsorption

作　　者：刘晓敏[1] 邓先伦[1] 朱光真[1] 王国栋[1] 许玉[1,2] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业局林产化学工程重点开放性实验室,江苏省生物质能源与材料重点实验室,江苏南京210042 [2]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《林产化学与工业》2012年第2期140-144,共5页Chemistry and Industry of Forest Products

基　　金：国家林业局林业公益性行业科研专项(201004051);"十一五"国家科技支撑计划资助(2009BADB1B03);中国林科院林业新技术所基本科研业务费专项资金(CAFINT2009K02)

摘　　要：对5种不同工艺制备的杉木颗粒活性炭的丁烷活性、丁烷工作容量、丁烷持附性与孔结构之间的关系进行了研究。结果表明:丁烷吸附性能与活性炭样品的比表面积、孔容积和孔径分布有着密切联系。对丁烷活性起作用的孔主要集中在1.16～2.00 nm;对丁烷工作容量有显著影响的孔径介于2.0～4.0 nm;对丁烷持附性影响最大的孔分布在0.5～1.0 nm。大孔对整个吸附过程没有什么显著影响,只是作为丁烷分子进入中孔、微孔的输送通道。Five kinds of wood-based granular activated carbons obtained from different raw materials and technologies have been experimentally studied for n-butane adsorption.The results indicate that butane adsorption capacity of activated carbon is strongly influenced by the specific surface area,pore volume and pore size distribution.It is the micropores between 1.16 nanometer and 2.0 nanometer that play the most important effect on adsorption.To obtain higher butane working capacity,it is important to form the micropores with diameter between 1.2 nanometer and 4 nanometer and high pore volume.The butane retentivity is significantly effected by the pores between 0.5 nanometer and 1.0 nanometer.Besides,as for macropore,it plays unappreciable role in the adsorption value,just acting transport for adsorbates.

关 键 词：活性炭 孔结构 丁烷工作容量 吸附 

分 类 号：TQ35[化学工程] TQ424