石炭のぬれ性と石炭組成との関係
石炭のぬれの研究 (第2報)
1981 年 97 巻 1123 号 p. 937-943
詳細
1981 年 97 巻 1123 号 p. 937-943
In this report, by the measurement of contact angles of formed powder-liquid systems between coal (or model materials of coal) and water, the author has made clear the relation between wettability of coal and coal elementary composition.
He has been submitted the following regression formula by the data of Table 4.θ=0.96 [H]-1.51 [O]-2.60Ash+15.71 (γ=0.916) here [H] and [O]: atomic ratios H and O per 100 atom C respectivelyθ: contact angle between coal and water
By the above-formula, the information of Figs. 1-6 on the bituminous coals (their elementary composition has shown in Figs. 7-9), brown coals data (Figs. 10-12 and Table 7) and the analysis on model materials of Table 8, the following points have been confirmed in this work.
Firstly, the wettability of coal is regulated by ash. On the relation between coal organic elementary composition and the wettability of coal, the superiority of atom ratio [0], especially oxygen functional group is hydrophilic tendency, the other way, that of aliphatic hydrocarbon and aromatic polymerization in the case of bituminous coals are hydrophobic.
