(2)

(3)

Heat produced by eq. 2 = Heat consumed by eq. 3

Therefore final equations for gasification becomes

(4)

     
Amount of steam is 0.768 Kg/kg of carbon

iii With oxygen + steam

Consider the gasification of a mole of carbon by a mixture of pure oxygen +steam
Assuming that all steam decomposes to H₂ and carbon forms CO.

(5)

(6)

Heat produced by eq. 5 = Heat consumed by eq. 6

Therefore final equations for gasification becomes

(7)

Amount of steam is 0.768 Kg/kg of carbon