不同活化因素对秸秆活性炭孔结构的影响  

Effect of different activation factors on pore structure of straw activated carbon

作　　者：杨可 李海红[1] 薛慧 裴盼盼 刘雨倩 YANG Ke;LI Haihong;XUE Hui;PEI Panpan;LIU Yuqian(School of Environmental and Chemical Engineering,Xi＇an Polytechnic University,Xi＇an 710018;Shaanxi Modern Architecture Dcsign ＆Rcscarch Institute,Xi＇an 710018,China)

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048 [2]陕西省现代建筑设计研究院,陕西西安710048

出　　处：《西安工程大学学报》2018年第3期272-278,290,共8页Journal of Xi’an Polytechnic University

基　　金：陕西省科技厅工业攻关项目(2017GY-151);陕西省科技厅工业攻关项目(2015GY168);陕西省教育厅服务地方专项计划项目(16JF010);陕西省"三秦学者基金项目"

摘　　要：以K_2CO_3为活化剂,辣椒秸秆为原料制备活性炭,研究活化温度、活化时间、浸渍比和浸渍时间等影响因子对活性炭孔结构的影响.以比表面积、总孔容及碘吸附值为表征指标,对活性炭孔结构进行分析.结果表明,在给定的取值范围内,随着影响因子值的增加,比表面积和碘吸附值都呈现先升高后降低的趋势.在800℃活化温度、120min活化时间、2∶1浸渍比、24h浸渍时间的最佳条件下,制备的活性炭比表面积和碘吸附值的最大值分别达到1 753.983m^2/g,1 754mg/g,总孔容为0.893cm^3/g,平均孔径2nm,微孔率达84%.With K2CO3 used as activator ,activated carbon is prepared from pepper straw. The effect of activation temperature, activation time, impregnation ratio and immersion time on pore structure of activated carbon is studied. The pore structure of activated carbon is analyzed by specific surface area, total pore volume and iodine adsorption value. The results show that with the increase of the influence factors in the range of the experimental conditions, the spe cific surface area and iodine adsorption value firstly increased and then decreased. The maxi mum specific surface area is 1 753. 983 m2/g and iodine adsorption value is 1 754 mg/g whenactivation temperature Is sion time 24 h. The total 800℃, activation pore volume is 0 time 120 rain, impregnation 893 cm3/g, average pore size 2 ： 1 and immer is 2 nm and micropore rate is 84%.

关 键 词：活性炭 BET比表面积 碘吸附值 

分 类 号：TQ424.1[化学工程]