Abstract
A method for measuring pore distribution is described. Two modified procedures are proposed in order to calculate the pore distribution by water vapour adsorption.
Measurement of the isotherm of the water vapour by a spring balance requires a long time. The “simplified method” presented in this paper is based on the fact that a relative vapour pressure is controlled by the saturated aqueous solution of a salt. Then, the increment of weight resulting from water vapour adsorption can be measured by a simple glass implement as shown in Fig. 1. Using many implements, the experimental time for measuring isotherms is considerably reduced.
Furthermore, a simplified and reasonable method for the calculation of pore distribution previously proposed is applied to the observed isotherm in the present work. The applicability of Eqs. 3 and 6 for the water vapour adsorption process as well as for nitrogen adsorption has been confirmed.
