Recovery and Utilization of Sulphur Dioxide from Exhaust Flue Gases to Control SO_2 Emission at Thermal Power Plant, Rajasthan

Article type: Research Article

Authors: Sharma, Arun Kumar | Acharya, Shveta | Sharma, Rashmi

Affiliations: Department of Chemistry, S.D. Govt. College, Beawar – 305901, Rajasthan, India

Note: [] Corresponding author. E-mail: [email protected]

Abstract: SO_2 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 SO_2 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 SO_2 monitoring kit of SO_2 measurement. To find the optimum temperature of absorption of SO_2 in NaOH solution, the study was carried out at various temperatures. As is clear from Table 2 it is 20–25°C which is the most appropriate for the maximum absorption of SO_2 by NaOH solution. Similar sets of experiments were carried out by varying the time intervals for absorption of SO_2 by NaOH solution. As is shown in Table 4 the increased absorption of SO_2 is observed with increase in time intervals.

Keywords: Flue gases, sulphur dioxide, sodium hydroxide, thermal power

Journal: Asian Journal of Water, Environment and Pollution, vol. 8, no. 3, pp. 29-35, 2011