Question

Catalytic converters are called three-way converters because they are used to reduce the concentration of CO. HC, and NOx in the exhaust.

(a) True

(b) False

This question was posed to me during an online interview.

Origin of the question is Catalytic Converters in section Engine Emissions and their Control of IC Engine

Answer 1

The correct answer is:

(a) True

Catalytic converters are called three-way converters because they facilitate three key processes to reduce the concentration of harmful emissions in the exhaust:

1. Oxidation of Carbon Monoxide (CO) to Carbon Dioxide (CO₂)
2. Oxidation of Hydrocarbons (HC) to Carbon Dioxide (CO₂) and Water (H₂O)
3. Reduction of Nitrogen Oxides (NOx) to Nitrogen (N₂) and Oxygen (O₂)

These three processes are crucial for reducing the environmental impact of internal combustion engine emissions.