- 6 Enthalpy Of Air Kj Kgmol Reference 25 C 1 Atm Temperature Air Degc 25 0 100 2 190 700 20 800 7 The Following 1 (47.38 KiB) Viewed 18 times
- 6 Enthalpy Of Air Kj Kgmol Reference 25 C 1 Atm Temperature Air Degc 25 0 100 2 190 700 20 800 7 The Following 2 (116.43 KiB) Viewed 18 times
Thermal oxidizers, or thermal incinerators, are combustion devices that control VOC, CO, and volatile HAP emissions by combusting them to carbon dioxide (CO₂) and water. Thermal oxidizers are similar to catalytic oxidizers (catalytic oxidizers use a catalyst to promote the oxidation reaction). Design a thermal oxidiser (PFR) to treat polluted air. The polluted waste air stream at 100 degC is combusted in a thermal oxidiser operating at 700 degC using dry natural gas at 25 degC. The average gas velocity of the waste air stream and combustion products within the oxidiser is 8.3 m/s. For design calculations consider the following: a. Write balance combustion equations on basis of 1 m³/hr natural gas b. Flowrate of natural gas required C. The diameter of the oxidiser d. The length of the oxidiser assuming a slenderness ratio of 3 e. Volume of the oxidizer f. The residence time of gases within the oxidiser Data: 1.Gross heating value of natural gas = 41169 kJ/m³ 2. Volumetric flowrate of polluted air= 7200 m³/h (@ 25degC, 1 atm) 3. Total enthalpy changes for combustion products: 20314.2 kJ/m³ natural gas 4. Allow 5% radiation losses 5. The total quantity of combustion products: 22.87 m³/m³natural gas 6. Enthalpy of air (kJ/kgmol): Reference 25° C, 1 atm. Temperature Air (degC) 25 100 2 190 700 20 800 7. The following additional data is provided: 1 of 2