Other Gases % Gases H 2 CO CH 4 C 2 H 4 C 4 H 8 O 2 N 2 CO 2 Coal Gas 49.4 18.0 20.0 0.0 2.0 0.4 6.2 4.0 Producer Gas 12.0 29.0 2.6 0.4 0.0 0.0 52.0 4.0 Blast Furnace Gas 2.0 27.0 0.0 0.0 0.0 0.0 60.0 11.0