中温煤沥青悬浮法制备球形活性炭的研究  

Study on Preparation of Spherical Activated Carbon by Medium Temperature Coal Pitch Suspension Method

作　　者：陈石林[1] 曾祥鸿 梁正 罗高强 梁玉林 宋振宇 CHEN Shilin;ZENG Xianghong;LIANG Zhen;LUO Gaoqiang;LIANG Yulin;SONG Zhenyu(College of Materials Science and Engineering,Hunan University,Changsha 410082,China;Guangxi Qiangqiang Carbon Co.,Ltd.,Baise 531400,China)

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]广西强强炭素股份有限公司,广西百色531400

出　　处：《湖南大学学报（自然科学版）》2022年第12期115-121,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金(面上)资助项目(51672079)。

摘　　要：以软化点为85℃、0.30~0.45 mm的中温煤沥青颗粒为原料,采用悬浮法制备沥青球,采用混合氧化法(HNO_(3)液相氧化和O_(2)气相氧化)对沥青球进行不熔化处理.不熔化沥青球经过炭化、CO_(2)活化法制备沥青基球形活性炭.采用SEM、TG/DTG、FT-IR对沥青球进行表征.结果表明,采用悬浮法制备的沥青球表面光滑、平均球形度0.981、粒径分布集中,0.30~0.45 mm的沥青球质量占比超93%.活化温度940℃,保温6 h制得的沥青基球形活性炭的BET比表面积为1545 m2/g、微孔率为75.30%.Using medium-temperature coal pitch particles with a softening point of 85℃and a particle size of 0.30~0.45 mm as raw materials,pitch balls were prepared by the suspension method and stabilized by the mixed oxi⁃dation method(HNO3 oxidation and O_(2) oxidation).Pitch-based Spherical Activated Carbon is prepared from nonmelting pitch balls through carbonization and CO_(2) activation.The pitch balls were characterized by SEM,TG/DTG,and FT-IR.The results show that the pitch balls prepared by the suspension method have a smooth surface,an aver⁃age sphericity of 0.981,and a concentrated particle size distribution.The weight of the pitch ball of 0.30~0.45 mm accounts for more than 93%.After the activation temperature of 940℃and 6 h of heat preservation,the BET specific surface area of Pitch-based Spherical Activated Carbon is 1545.20 m2/g and the microporosity is 75.30%.

关 键 词：煤沥青 活性炭 悬浮法 混合氧化 比表面积 

分 类 号：TB322[一般工业技术—材料科学与工程]