An electric utility uses a Pennsylvania coal that has an ultimate analysis (by mass) of 84.36 percent C, 1.89 percent H₂, 4.40 percent O₂, 0.63 percent N₂, 0.89 percent S, and 7.83 percent ash (non combustibles) as fuel for its boilers. The utility is changing from the Pennsylvania coal to an Illinois coal which has an ultimate analysis (by mass) of 67.40 percent C, 5.31 percent H₂, 15.11 percent O₂, 1.44 percent N₂, 2.36 percent S, and 8.38 percent ash (non combustibles) as fuel for its boilers. With the Pennsylvania coal, the boilers used 15 percent excess air. Develop a schedule for the new coal showing the heat released, the smokestack dew-point temperature, adiabatic flame temperature, and carbon dioxide production for various amounts of excess air. Use this schedule to determine how to operate with the new coal as closely as possible to the conditions of the old coal. Is there anything else that will have to be changed to use the new coal?