橡木锯屑制备直接碳燃料电池活性炭  

STUDY ON THE PREPARATION OF ACTIVATED CARBON FOR DIRECT CARBON FUEL CELL WITH OAK SAWDUST

作　　者：郭厚焜[1] 仲兆平[1] 张居兵[1] 金保昇[1] 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《太阳能学报》2011年第3期402-407,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50776019);教育部博士学科点专项科研基金(200802860038);国家重点基础研究(973)发展计划(2007CB210208)

摘　　要：以橡木锯木屑为原料,K2CO3为研究活化剂,采用化学活化法制备DCFC用活性炭,着重考察了碱炭比、活化温度、活化时间对活性炭的比表面积、孔隙率的影响,同时采用HNO3浸渍对活性炭表面进行改性及镍负载对活性炭导电性能进行改善。研究结果表明:当碱炭比为1、活化温度为900℃、活化时间为120min时,活性炭比表面积达1240m2/g,孔容积为0.768m3/g;镍负载后的活性炭体积电阻率明显下降;HNO3浸渍后,活性炭表面含氧官能团增多,灰分明显减少,但比表面积有一定下降,而体积电阻率增加明显。The activated carbon for DCFC was prepared from oak sawdust by K2 CO3 as activator. The influences of the ratio of K2CO3 to carbon, activation temperature and activation time on adsorption properties were emphatically studied. Further more, the effect of HNO3 treatment on surface modification as well as ash removal and the effect of nickel catalyst on electrical conductivity were investigated. Additionally, the effect of HNO3 treatment on specific surface area and electrical conductivity was also discussed. The results showed that activated carbon with specific surface area of 1240m2/g and pore volume of 0.768m3/g could be produced when the ratio of KOH to carbon was 1; activation temperature is 900℃ and activation time is 120min. It was found that the electrical conductivity could be well improved through nickel catalyst, the amounts of surface oxygen functional groups are increased and the ash content is decreased significantly through HNO3 treatment. Unfortunately, the specific surface area is decreased a little and the volume resistivity is increased evidently.

关 键 词：直接碳燃料电池 活性炭 比表面积 表面含氧官能团 体积电阻率 

分 类 号：TM911.47[电气工程—电力电子与电力传动]