分析値による石炭の統計的研究 (III)

水素, 酸素含有量と水分の関係

抄録

In this third report, the reporter has studied statistically the relation between the moisture and the ultimate analytical values in various coals, examining the relation of the moisture to hydrogen content and that to oxygen content separately;he has eliminated the relation between these contents with partial correlation analyses.The infer ence drawn from the study is as follows:
(1) In the area covering brown coal and anthracite, the retation of the moisture to the carbon weight percentage is similar to the relation of density to the carbon weight percen-tage.But the minimum value of the moisture slips off that of density in connection with the carbon weight percentage.
(2) The moisture of coals whose carbon weight percentage is lower than that at its minimum has a positive interrelation chiefly with the oxygen content, and scarcely has any correlation with hydrogen.
(3) In contrast to that, the moisture of coals whose carbon weight percentage is higher than at its minimum has a negative interrelation with hydrogen content.Excepting the coals in which is contained extremely small amount of hydrogen, i.e.whose H/C atomic ratio is less than 0.2, the amount of oxygen has scarcely anything to do with it.
(4) In the low-coalification coals, physical adsorption prevails, whereas chemical ad-sorption comes to gain importance as the coalification proceeds.
(5) In respect to the moisture too, peat and lignite are proved to have quite different qualities from the coals of the area covering brown coal and bituminous coal.
(6) Though the moisture contained in peat has close relation with the chemical com-ponents of peat, such relation is hardly discerned in lignite.