PREPARATION OF ACTIVATED CARBON BY KOH ACTIVATION ON STRAW LIGNIN

摘要：

Activated carbons were prepared through chemical activation on lignin from straw pulping precursor using KOH as the chemical agent. Effects of activating temperature, mass ratio of the activating agent to lignin, and activating time on the yield and iodine number of the activated carbons were investigated. The activated carbons were characterized in terms of BET surface area, total-, micro- and mesopore volumes, average pore width, carbon yield and iodine adsorption capacity. The influences of each factor of the synthesis on the properties of the activated carbons were discussed. Experimental results indicated that the optimum conditions were as follow: activated temperature 700 ℃, KOH (40％ concentration) to lignin ratio 5:1, activating time 40min. Under the optimum conditions of KOH activation, obtained was the activated carbon with BET surface area of 917 m2/g which included external surface area of 231 m2/g, the amount of methylene blue adsorption was 96mL/g, iodine number was 1180 mg/g and the yield of activated carbon was 18.7％.

关键词： activated carbon KOH adsorption

作者: Xiaojuan Jin Ting Zhang Ying She

作者单位: College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 228-232

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）