lowgrade

1.In this study a series of different maturation degree coals are yielded by thermally treating a lowgrade lignite, and are used as the sorbents for sorption equilibrium study of phenanthrene.

将云南先锋褐煤采用热模拟的实验方法制得熟度不同的煤,并将煤中的干酪根用对菲的吸附研究。