Less dense types, such as sub-bituminous and lignite coal, can contain up to 50% water.
低浓度的煤炭，如亚煤烟煤和褐煤等，其含水量最高可达50%。
This paper also investigates the oxidation process and mechanism of inhibition for lignite, bituminous and high sulphur coals from the viewpoint of reactant activation energy and surface active sites.
用反应物的活化能、表面活性中心的观点，探讨了褐煤、烟煤、高硫煤的氧化过程及阻化机理。
The differential thermal curve of the lignite coal is similar to that of the bituminous coal in the two thermopositive peak values.
褐煤与烟煤的差热曲线相近，其特点是有两个热解放热峰。
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