煤质成型活性炭的制备及其吸附性能研究  

PREPARATION AND ADSORPTION PROPERTIES OF COAL-BASED FORMED ACTIVATED CARBON

作　　者：邢宝林[1] 王力[1] 马爱玲 郭晖[1] 谌伦建[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作博士讲师454003 [2]河南工程技术学校,河南焦作工程师454000

出　　处：《煤炭转化》2014年第1期76-79,87,共5页Coal Conversion

基　　金：河南省重点科技攻关项目(102102210207);河南省教育厅自然科学基金资助项目(2011A480003)

摘　　要：以神木烟煤为原料,煤沥青为黏结剂,在较低浸渍比下采用KOH和ZnCl_2活化法制备成型活性炭,利用低温(77 K)N_2吸附法对活性炭的比表面积及孔结构参数进行表征,考察浸渍比对活性炭孔结构的影响及其液相吸附性能,并对比分析两种化学活化法所制活性炭结构与性能的差异.结果表明,在相同浸渍比下,KOH活化法所制成型活性炭的比表面积、总孔容及碘吸附值均高于ZnCl_2活化法.当浸渍比为1.0时,采用KOH活化法可制备出表面积为811 m^2/g,总孔容为0.513 cm^3/g,中孔比例为23.6%,碘吸附值为1 125 mg/g的成型活性炭;采用ZnCl_2活化法可制备出表面积为472 m^2/g,总孔容为0.301 cm^3/g,中孔比例为30.6%,碘吸附值为527 mg/g的成型活性炭.两种活化法所制成型活性炭的孔径主要分布在1.2 nm^2.0 nm的微孔和3.6 nm^4.5 nm的中孔范围内.Formed activated carbon was prepared from Shenmu bituminous with coal tar pitch as binder by KOH and ZnCl2 activation under low impregnation ratio.Specific surface area and pore structure parameters were characterized by nitrogen adsorption at 77 K.The influence of impregnation ratio on pore structure of formed activated carbon and its adsorption properties were investigated.The differences of structure and properties of activated carbon prepared by KOH and ZnCl2 activation were also studied.The results showed that the specific surface area,total pore volume and iodine adsorption value of activated carbon prepared by KOH activation were all higher than ZnCl2 activation under the same impregnation ratio.The specific surface area,total pore volume,the ratio of mesopore and iodine adsorption value of formed activated carbon prepared by KOH activation reaches 811 m2/g,0.513 cma/g,23.6％,1 125 mg/g when the impregnation ratio is 1.0,and formed activated carbon prepared by ZnCl2 activation reaches 472 m2/g,0.301 cm3/g,30.6％,527 mg/g respectively.The pore size of formed activated carbon prepared by two kinds of activation method mainly distribute in a range of 1.2 nm-2.0 nm and 3.6 nm-4.5 nm.

关 键 词：成型活性炭 化学活化法 吸附性能 

分 类 号：TQ424.1[化学工程]