The low molecular weight compounds contained in Yueliangtian coal existed by free and absorbent forms, the low molecular weight compounds existed by co-soluble modes in Kaili coal.

• 在月亮田煤样中，低分子化合物多以游离态和吸附态形式存在，而在凯里煤样中，低分子化合物多以共溶态形式存在。