Please use this identifier to cite or link to this item: http://localhost:8081/xmlui/handle/123456789/6731
Title: STUDIES ON REMOVAL OF NO FROM GAS STREAM IN A PACKED BED
Authors: Karnwal, Rajat
Keywords: CHEMICAL ENGINEERING;REMOVAL NO;GAS STREAM;PACKED BED
Issue Date: 2001
Abstract: The present investigation pertains to a theoretical study on performance characteristics of a packed bed column where in absorption process is being accompanied by a chemical reaction. The system used for the packed bed column is the absorption of N204 in water. The effect of different operating parameters viz. gas pressure (0.5 atm to 3.0 atm), inlet concentration of N204 (5% to 10%), packings (Intalox saddle, Berl saddle, Pall rings, Raschig rings), packing size (25mm and 38mm), removal efficiency (70% to 95%) and flow rate (500 kg/hr to 1000 kg/hr) on the diameter and height of the column has been studied. Estimation of diameter of packed bed is made by making inert balance, solute balance and solvent balance. Material balance between bottom and any arbitrary cross section within tower has been done, to obtain the equation of the operating line. The minimum liquid to gas ratio has been obtained by substituting mole fraction of solute in liquid that is in equilibrium with the gas. Flooding mass velocity of gas is obtained by using Chen's correlation. Estimation of height of packed bed column is made by making differential mass balance of N204 across the differential section of the column and then integrating using the trapezoidal rule. The local rate of absorption per unit area was computed from two film model. Enhancement factor was calculated by using correlation given by Hitika and Asai. 113 The effect of operating variable viz. pressure of the gas, inlet concentration, temperature, removal efficiency, different packings and packing size has been studied. The result shows that diameter increase with the increase in the flow rate, removal efficiency, temperature while decreases with the increase in total pressure, packing size. Height of packed bed column increases with increase in removal efficiency, packing size, total pressure but decreases with increase in temperature and remains constant with the change in flowrate.
URI: http://hdl.handle.net/123456789/6731
Other Identifiers: M.Tech
Research Supervisor/ Guide: Bhattacharya, S. D.
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (Chemical Engg)

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