ANALYTICAL METHODS OF MICROPORE STRUCTURE OF ACTIVATED CARBON FIBER

Several methods for analysis on micropore structure of activated carbon fiber, such as DR plot, t plot and α s plot, were described on the basis of the nitrogen adsorption isotherms determined experimentally. Micropore volume of activated carbon fiber obtained by the three methods was identical, and the micropore structure parameters obtained by t plot and α s plot were in good agreement. DR plot, which can be deduced theoretically without standard adsorption isotherm, can get the characteristic adsorption energy related to the micropore surface, while t plot and α s plot can get the total, internal and external surface area. It is considered that α s plot is more suitable for the analysis of micropore structure than t plot.