Abstract
As the simple methods for manifesting the features of innerstructure of coals, the measurements of iodine and methylene blue adsorption from the aqueous solutions are suitable.After the estimation of adequate conditions, these measure-ments were carried out using ca.40 kinds of coals of every rank as samples.The essential point is in comparing the specific surface areas of both series calculated from the adsorption data with the assumption of mono-molecular adsorption.Lignites, sub-bituminous, bituminous coals and anthracites are rather decidedly classified by this simple treatment.
