Which of the following gases are major components of the syngas produced during Underground Coal Gasification (UCG)?

1. Hydrogen (H₂)

2. Methane (CH₄)

3. Carbon Monoxide (CO)

4. Sulfur Dioxide (SO₂)

Select the correct answer using the codes below:

The correct answer is option 2

Key Points

• Hydrogen (H₂), Methane (CH₄), and Carbon Monoxide (CO) are the primary components of syngas produced in UCG.
• Sulfur Dioxide (SO₂) is not a major syngas component but a pollutant produced in trace amounts due to sulfur content in coal.

Additional Information

•  Applications of Syngas:
  • Power Generation: Used in Integrated Gasification Combined Cycle (IGCC) plants for cleaner electricity.
  • Hydrogen Production: Used in hydrogen fuel cells and ammonia synthesis (Haber-Bosch process).
  • Synthetic Fuels: Converted into liquid fuels (Fischer-Tropsch process) for cleaner alternative fuels.
  • Chemical Industry: Used for producing methanol, synthetic natural gas (SNG), and fertilizers.