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Coal












                • Composition




                • 84.4% carbon, 5.4% hydrogen, 6.7% oxygen, 1.7%


                   nitrogen, and 1.8% sulphur,




                • C H O NS +
                      135 96 9


                  SiO2              20-40

                  Al2O3             10-35

                  Fe2O3             5-35
                  CaO               1-20

                  MgO               0.3-4
                  TiO2              0.5-2.5

                  Na2O & K2O        1-4
                  SO3               0.1-12


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