Recovery and Utilization of Sulphur Dioxide from Exhaust Flue Gases to Control SO2 Emission at Thermal Power Plant, Rajasthan
SO2 is a major constituent in air pollution. Pet coke (having 6 % Sulphur) with lime stone are being used for power generation in thermal power plants. Sulphur dioxide is produced during combustion of fuels containing sulphur and affects the environment in number of ways like acid rain corrosion and severe damage to health. Flue gas desulphurization (FGD) is the technique used for removal of SO2 from exhaust flue gases in power plants. In accordance with the invention, flue gases containing sulphur dioxide are passed through a solution which was rich with sodium ions to produce sulphate by using SO2 monitoring kit of SO2 measurement.
To find the optimum temperature of absorption of SO2 in NaOH solution, the study was carried out at various temperatures. As is clear from Table 2 it is 20–25 ºC which is the most appropriate for the maximum absorption of SO2 by NaOH solution. Similar sets of experiments were carried out by varying the time intervals for absorption of SO2 by NaOH solution. As is shown in Table 4 the increased absorption of SO2 is observed with increase in time intervals.
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