活化条件对活性炭表面性质的影响.PDF

l 98 9年 9月 重 庆 大 学 学 报 Vo1．1 2．No．5 第J2卷第 5期 JOURNAL OF CHONGQING UNIVERSITY Sept．1 98 9 活化条件对活性炭表面性质的影响 EFFECT OF ACTIVATION CONDITION ON SURFACE PROPERTIES OF ACTW ATED CARCON 牡 语 群 刘 翔 李 永 凡 Du Yuqun Liu Xiang Li Youngfan (应用化学系 ) 冯 世 勤 Feng Shiqin (重度煤炭设计研完院 ) 摘 要 用Ⅳ 吸附法系统研究了温度和气氟(还原性气氛，情性气氛)对重 庆松藻原煤试制活性炭表面性质(比表面积、孔径舟布、 孔结构及孔形状)的黟 响J虹外光谱法初步测定了活化条件对其表面基团的移响。结果表明，活性灰在不 同气氛中经高温活化 表面积减小，按顺序： 在氮气氛中豫小不大， 在日z气中减小 较大，在(N。+H )混合气中明显减小。孔由微孔为主变成以中孔为主， 孔形由 墨水瓶形变成园筒形 关t诃 活性炭}活化，比表面积j孔分布}氮吸附 中国图书资料分类法分类号 O 647．3 J 1 ABSTRACT The method of nit rogcn adso rption is used to study the effect of temperature and atmosphere(inert and reducing almosphe re)on surface pr。pe rties—— specific surface area1．pore dist ribution and pore st rucu re of activaled ca rbon made from raw coal(produced in Chongqing Shongzao)．Infra Jcd spectroscopy was also used to determine the effect of activation condition on su rfacc g roup of activated ca rbon．The results shOW that the surface atea of activated carbon decteases when activated at high temperature．The reduction of specific su rface a rea is the largest in N2+H z atmosp— ． here，and is larger in 2 atmosphe re than that in Nz atmosphere． Besides，the main part of pores is changed into transient from micro—po re．and pore shape is also changed into columnar shape from shape of ink cottle． KEY W ORDS activated ca rbon；activation；specific surface ar