Catalytic incineration is a process that utilizes a catalyst to accelerate desired oxidation reactions of chemicals....
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Catalytic incineration is a process that utilizes a catalyst to accelerate desired oxidation reactions of chemicals. The process is used to, for example, treat solid wastes, and remove odorous gases or other obnoxious substances. The main advantage of this process over direct incineration (i.e., incineration without using a catalyst) is the lower cost. Catalytic incinerators operate at lower temperatures-500 to 900 °C compared with 1100 to 1500 °C for direct incinerators - and use substantially less fuel. Because of the lower operating temperatures, materials of construction do not need to be as heat resistant, reducing instalation and construction costs. In a catalytic combustor, a liquid having 88 weight % C and 12 weight % H is vaporized and bumed by air (79 mole % N2 and 21 mole % O:) to a flue gas of the following composition: 11.9 volume % CO, 1.6 volume % CO, 4.1 % volume O, and 82.4% volume N2. The combustion process also converts all H in the fuel into H:O which exits the combustor as a separate stream. a. Determine the volume of the flue gas (at T= 500 °C, P=1 atm) produced per 50 kg of liquid fed. b. Evaluate the closure of the material balance with respect to oxygen. Catalytic incineration is a process that utilizes a catalyst to accelerate desired oxidation reactions of chemicals. The process is used to, for example, treat solid wastes, and remove odorous gases or other obnoxious substances. The main advantage of this process over direct incineration (i.e., incineration without using a catalyst) is the lower cost. Catalytic incinerators operate at lower temperatures-500 to 900 °C compared with 1100 to 1500 °C for direct incinerators - and use substantially less fuel. Because of the lower operating temperatures, materials of construction do not need to be as heat resistant, reducing instalation and construction costs. In a catalytic combustor, a liquid having 88 weight % C and 12 weight % H is vaporized and bumed by air (79 mole % N2 and 21 mole % O:) to a flue gas of the following composition: 11.9 volume % CO, 1.6 volume % CO, 4.1 % volume O, and 82.4% volume N2. The combustion process also converts all H in the fuel into H:O which exits the combustor as a separate stream. a. Determine the volume of the flue gas (at T= 500 °C, P=1 atm) produced per 50 kg of liquid fed. b. Evaluate the closure of the material balance with respect to oxygen.
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