网页煤和液体气体燃烧还是没法比,一般认为煤是最具污染性的化石燃料。. 对全球CO2的排放量贡献可达4成。. Heating Value of Coal. The assay of particular coal from Illinois is as follows by mass: 67.40 percent carbon (C), 5.31 percent hydrogen (H2), 15.11 percent oxygen (O2), 1.44 percent nitrogen (N2), 2.36 ...