Moderate
Limestone powder is injected during pulverised coal burning in boilers to ______________ the flue gases?
Correct answer: A. Reduce SO2 content in
- A. Reduce SO2 content in
- B. Catalytically convert SO2 to SO3 in
- C. Increase the dew point of
- D. None of these
Explanation
Limestone, mainly calcium carbonate, reacts with sulphur dioxide in the boiler or flue-gas system to form calcium sulphite or sulphate. This captures SO2 and lowers its concentration in the flue gas rather than converting it catalytically to SO3.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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