摘要
将煤焦与KOH混合,在惰性气流中,进行400℃,900℃二次热处理,制得了表面积为2.54×10~3m^2/g的活性炭.并用X射线衍射分析研究了煤焦成孔过程中的石墨微晶变化.发现在高温热处理过程中,石墨微晶中碳网层片直径有较大增长,而碳网层片尾数明显变低.使煤焦可能形成了平堆积层数在1-2之间的联网层片成孔的活性炭.因而具有很大的表面积.
The active carbon of surface area of 2540m2/g is made from twice heat treatment of KOH-coal char in the inert atomosphere at 400℃ and 900℃. The variation of size of graphite crystallite has been investigated during forming pore of active carbon with X-yay diffraction. It is found that the diameter of the graphite-like plane of crystallite increases greatly and the stack thickness decreases greatly in the heat treatment of high temperature.The mechanism of forming pore has also been discussed.
关键词
X射线衍
活性炭
煤焦
表面积
X-ray diffraction
active carbon
coal char
sarface area
