Coal is processed using air and steam to produce a syngas with an H2-to-

N2 ratio of 3. The coal has 10% ash and 90% C. 1% of the carbon is lost with the ash. In the water gas cycle, 80% of the steam reacts. In the gas generator cycle, 65% of the carbon produces CO2 and the rest CO. In the water gas cycle, the carbon generates CO. The air used is at 25C and 760 mmHg with 55% relative humidity.

Determine:

a. Relative amount of air and steam.

b. Heating power of the gas produced per ton of coal.

c. Amount of air required per ton of coal.