Fe催化CO_2改性活性炭及其吸附性能实验研究  

STUDY ON MODIFICATION OF ACTIVATED CARBON BY CO_2 WITH Fe AS CATALYST AND ITS ADSORPTION PROPERTIES

作　　者：任建良 刘应书[1] 李永玲[1] 张传钊[1] 

机构地区：[1]北京科技大学机械工程学院,北京硕士生100083

出　　处：《煤炭转化》2015年第3期87-91,共5页Coal Conversion

基　　金：国家自然科学基金资助项目(51306017)

摘　　要：以Fe为催化剂,利用CO2气体对分离煤层气所用的活性炭进行改性实验,分别研究铁碳比、活化温度、CO2流量和活化时间对活性炭孔结构及CH4吸附量的影响.结果表明,nFe∶nC=0.12,活化温度650℃,CO2流量3.0L/min,活化时间1.5h是最佳的改性条件;改性后活性炭孔结构更加发达,表面积增大,特别是新增了孔径为5nm^9nm的中孔;在相同的压力(107kPa)和吸附分离因子维持不变的情况下,改性后活性炭对甲烷气体的吸附量相对于原始活性炭提高了16.55%.The activated carbon（AC） used for separating coalmine gases were modified by replenishing CO2 with Fe served as the catalyst. The effects of nFe ： nc, activation temperature, CO2 flow and activation time on the pore structure of AC and the adsorption of CH4 were investi- gated. The results showed that the best condition was Correspondingly： 0.12, 650 ℃, 3.0 L/rain and 1.5 h. Pore structures and the specific surface area of AC after the physical modification were enhanced, particularly the mesopores with diameter from 5 nm to 9 nm. Under the condition of 107 kPa and the same separation factor, the saturated CH4 adsorption of modified AC was 16.55% higher than that of the original ones.

关 键 词：活性炭 催化改性 吸附性能 孔结构 

分 类 号：TQ032[化学工程] TQ424.1