炭纤维和活性炭甲醇气相吸附动力学和等温线

新型炭材料, 2003, 18(2): 133-136.

炭纤维和活性炭甲醇气相吸附动力学和等温线

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1.Laboratoire de Chimie et Applications, EA 3471, Université de Metz, Rue Victor Demange-57500 Saint-Avold, France

2.Laboratoire de Chimie et Applications, EA 3471, Université de Metz, Rue Victor Demange-57500 Saint-Avold, France

3.Laboratoire de Chimie et Applications, EA 3471, Université de Metz, Rue Victor Demange-57500 Saint-Avold, France

4.Laboratoire de Chimie et Applications, EA 3471, Université de Metz, Rue Victor Demange-57500 Saint-Avold, France

关键词：炭材料 , 吸附动力学 , 等温线

Isotherms and kinetics of methanol vapor adsorption on carbon fibers and activated carbons

Keywords： Carbon materials , Kinetic of adsorption , Isotherms

采用不同原料、不同活化过程的两种活性炭和两种炭纤维(PAN、Rayon基)进行了甲醇气相静态吸附,结合其吸附动力学和等温线的数据研究了有关扩散问题,发现温度与所用样品表面化学性质、中孔率、孔隙(形态与大小)微织构对其吸附动力学有影响.

Adsorption of methanol vapor on two activated carbons with different origins and activation, and two carbon fibers (ex-PAN and ex-rayon) were investigated in static conditions. An original approach for diffusion problems by combining data from isotherms and adsorption kinetics is presented. It is found that the adsorption kinetics are influenced by temperature, the surface chemistry, the mesoporosity and the microtexture of the pores (shape and size) of the samples studied.

参考文献

[1]	Siemieniewska T;Tomkow K;Kaczmarczyk J et al.Application of the Dubinin-Astakhov equation to evaluation of benzene and cyclohexane adsorption isotherms on steam gasified humic acid chars from brown coal[J].Energy and Fuels,1990,4:61-70.
[2]	Reid C R;Thomas K M .Adsorption of gases on a carbon molecular sieve used for air separation: linear adsorptives as probes for kinetic selectivity[J].Langmuir,1999,15:3206-3218.
[3]	Okoye IP.;Thomas KM.;Benham M. .ADSORPTION OF GASES AND VAPORS ON CARBON MOLECULAR SIEVES[J].Langmuir: The ACS Journal of Surfaces and Colloids,1997(15):4054-4059.
[4]	Sircar S;Hufton J R .Why does the linear driving force model for adsorption kinetics work?[J].Adsorption-Journal of the International Adsorption Society,2000,6:137-147.

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