活化介质对活性炭微结构及CO_2吸附性能的影响  

Effect of activation medium on microstructure and CO_2 adsorption performance of activated carbon

作　　者：简相坤[1,2,3,4] 刘石彩[1,2,3,4] 边轶[1,2,3,4] 

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

出　　处：《功能材料》2014年第1期95-98,共4页Journal of Functional Materials

基　　金：国家科技支撑计划资助项目(2012BAD30B03);农业科技成果转化资金资助项目(2012GB24320583)

摘　　要：以煤质炭化料为原料,分别以水蒸气和 CO 2为活化介质制备出微孔结构发达的活性炭.利用 N2吸-脱附等温线、碘吸附值、亚甲基蓝吸附值、CO 2吸附容量、CO 2解吸率和扫描电子显微镜（SEM）对其进行表征.结果表明,在实验室条件下,水蒸气法和 CO 2法制备样品的孔径均以0．5~1．0 nm 的微孔为主,在同等条件下,CO 2法制备样品0．5~1．0 nm 范围的微孔含量要比水蒸气法制备样品多10％以上.同时水蒸气法制备样品的中孔分布范围为2．0~3．0 nm,CO 2法制备样品中孔分布范围为2．0~2．5 nm.在同等实验条件下,水蒸气活化制备出活性炭比 CO 2的孔径分布更广,活性炭的亚甲基蓝吸附值、碘吸附值及 CO 2解吸率更高,而 CO 2法制备出的样品对 CO 2的吸附容量更大.Developed microporous activated carbons were prepared from carbonized coal by using steam activation and CO 2 activation.The N2 adsorption-desorption isotherms,iodine value,methylene blue value,CO 2 adsorp-tion capacity,CO 2 desorption value and SEM were applied to characterize the activated carbons.The results showed that the main pore of activated carbons distributed in the range of 0.5-1.0 nm by using steam activation and CO 2 activation.In the same experiment condition,the pore content in the range of 0.5-1.0 nm obtained by CO 2 activation were 10% more than by steam activation,while the mesopore of activated carbons by using steam and CO 2 activation respectively distributed in the range of 2.0-3.0 nm and 2.0-2.5 nm.The methylene blue value,iodine value and CO 2 desorption value of activated carbons by using steam activation were higher than ac-tivated carbons by using CO 2 activation,but the CO 2 adsorption capacity of activated carbons by using CO 2 acti-vation were higher than activated carbons by using steam activation.

关 键 词：活性炭 水蒸气 CO2 活化 吸附 

分 类 号：TQ424.1[化学工程]