摘要
以石油焦为炭前驱材料、用不同试剂作为活化剂,讨论了不同活化剂对石油焦的活化作用。在以KOH为活化剂时,研究了活化条件对活性炭孔结构的影响。结果表明,强碱具有明显的活化作用,盐类试剂的活化作用很差,且KOH的活化作用远优于NaOH。在碱与碳质量比为4、800℃下活化60min制得了BET比表面积为3422m2/g的超高比表面积活性炭(SBET≥2500m2/g)。且碱与碳质量比越大、活化温度越高及活化时间越长,所制得活性炭中大于2nm的孔所占的比例越大。
Activated carbons were prepared by chemical activation with different chemical agents from petroleum coke. The influence of preparation conditions on the structure of activated carbons was studied. The results indicated that chemical activation with KOH can be successfully used to develop activated carbons with super-high specific surface area (S_(BET)≥2 500 m^2/g). The proper choice of the preparation conditions (the ratio of OH/C is 4, and activated 60 min under 800 ℃) allows us to produce activated carbon with super-high specific surface area of 3 422 m^2/g. It was found that the percent of greater than 2 nm pores increased with the increasing of the ratio of OH/C, activation temperature and activation time.
出处
《化工科技》
CAS
2005年第2期7-11,共5页
Science & Technology in Chemical Industry
基金
中国科学院
重庆市科技成果孵化基金资助
关键词
比表面积
活性炭
化学结构
石油焦
孔容
Activated carbon with super-high specific surface area
Petroleum coke
Activation condition
Pore texture
Pore volume
