GATE CE 2024 Set 2 — Question 25
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Environmental Engineering → Air Pollution → Air Pollution Control
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Question
What is the CORRECT match between the air pollutants and treatment techniques given in the table?
| Air pollutants | Treatment techniques |
|---|---|
| P - NO | i - Flaring |
| Q - SO | ii - Cyclonic separator |
| R - CO | iii - Lime scrubbing |
| S - Particles | iv - NH injection |
Correct answer
(D) P-iv, Q-iii, R-i, S-ii
Solution
The correct matches for air pollutant treatment techniques are:
1.NO (Nitrogen Dioxide): Removed via Selective Catalytic Reduction (SCR) or Selective Non-Catalytic Reduction (SNCR) where NH injection (iv) is used to reduce NOx to N.
2.SO (Sulfur Dioxide): Removed using Flue Gas Desulfurization (FGD) systems, most commonly through Lime scrubbing (iii).
3.CO (Carbon Monoxide): Combustible gases like CO are typically treated by Flaring (i) to oxidize them into CO.
4.Particles: Particulate matter is separated from gas streams using mechanical collectors like a Cyclonic separator (ii).
Therefore, the match is P-iv, Q-iii, R-i, S-ii, which corresponds to option (D).Continue learning with Success Tracker
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