The Comparative Method for Apparent Density Measurement as a Means of Fine Carbonaceous and Inorganic Porous Material Characterization by the Determination of Shape Coefficient

Abstract

These investigations are a part of work whose aim is an elaboration of a characterization method for porous fine powders with use of densimetric measurements. Especially, attention to methods of shape coefficient determination was given in this work because many other investigations pointed out that knowledge of this parameter is necessary for such studies. Shape coefficient values were determined with the use of Powers's method (K), the quantitative method (1/L), and the new comparative method (1/k). While densimetric measurements in the characterization of solids are a standard, the comparative method of apparent density determination is applied for the calculation of shape coefficients (1/k). The shape coefficient (1/k) characterizes not a single element of the fine solid but a collection of particles in the bed. The coefficient (1/k) represents the out-of-roundness degree of packed grains in relation to a bed of spheres with the same size distribution as the investigated material.