摘要
在氮气气氛中,N2的流量为100 mL/min,分别在450℃和950℃并均加热30 min制备了活性炭纤维的热改性样品,分别改性样品记为ACF1和ACF2。分别考察了未改性样品ACF0和改性样品ACF1及ACF2对低浓度甲苯的吸附等温线。基于甲苯吸附等温线,利用Mandelbrot分形理论对3种ACF样品进行了分形维数(Df)的分析,计算得到3种ACF样品的Df值分别为Df,0=2.542 5,Df,1=2.569 2,Df,2=2.573 4,从分形理论角度解释了热改性改善ACF吸附性能的原因。最后通过对ACF样品的表征数据验证了试验结果和ACF结构分形分析的正确性。
In the atmosphere of nitrogen with gas flow of 100 mL/min, the activated carbon fiber（ACFs） were modified respectively under 450 ℃ and 950 ℃ with heating time of 30 min, the modification samples of ACFs were marked as ACF1 , ACF2 . The low concentration of toluene adsorption isotherms of the samples of original ACF0, ACF1 and ACF2 were studied respectively. On the foundation of the toluene adsorption isotherms, the fractal dimensionality （Df） of three ACFs samples were analyzed according to Mandelbrot fractal theory. Through calculation, the Df of the three ACFs samples were Df,0 = 2.542 5, Df,1 = 2.569 2, Df,2 = 2.573 4. The reason why heating modifieation ean improve the adsorption eapability of ACFs was explained with fraetal theory. Finally, the experimental results and the fraetal analyses of ACFs property were eonfirmed with the token data of ACFs samples.
出处
《化学工业与工程》
CAS
2008年第2期116-120,共5页
Chemical Industry and Engineering
基金
云南省自然科学基金资助项目(2004B0012M)
关键词
活性炭纤维
热改性
甲苯
分形
activated carbon fiber
heat modification
toluene
fractal
