适用于对碳素不同孔径分布测定的，基于碳氢吸附的DFT测试方式特性分析

Adsorption isotherms of N2, Ar, CO2, and H2 were measured on selected activated carbons representing various pore size distributions. Isotherm data were analyzed using the DFT method. A good agreement was obtained between N2 and Ar results in a wide range of pore sizes. Both N2 and Ar results agree with CO2 analysis at 273 K in the range of small micropores where CO2 analysis is most applicable. Also, in this range of pores the analysis of H2 adsorption data at 77 K gives results which are consistent with the results obtained from the more conventional vapor-phase adsorptives. However, the range of PSDs calculated from H2 data extends to pore sizes smaller than those that can be characterized by other adsorbates._ 2004 Elsevier Ltd. All rights reserved.