A bituminous coal has the following analysis: 74.4% C, 5.1% H, 1.4% N, 6.7% O, 0.7% S and 11.7% ash. It is burned with excess air to generate electricity power in a power station at the feed rate of 50 kg/s. The temperature of the flue gas is 1100 K. Assuming that the molar ratio of NO to NO₂ in the flue gas is 1:1, and they are the only forms of NOx present in the flue gas. If NH3 is to be injected to the flue gas to control NOx, how much NH3 would be required per day (assuming no excess NH3 is required). At 1100 K: 2NO2 + 4NH3 + O₂ → 3N2 + 6H₂O 4NO + 4NH3 + O₂ → 4N2 + 6H₂O. Select one: a. 100.16 ton/day Ob. 990.16 ton/day C. 120.16 ton/day d. 110.16 ton/day
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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