Heat Exchanger Function in Gas Processing

Steps:

• Identify the context: Heat exchangers manage temperature in industrial processes like gas reactions.
• Analyze choices: Match each to typical roles in cooling, heating, or separation.
• Eliminate mismatches: Rule out options involving warming, product cooling, or separation.
• Confirm cooling role: Select the option focused on incoming gas cooling.

Why D is correct:

• Heat exchangers cool incoming gases to prevent thermal damage and ensure safe processing, per basic thermodynamics where heat transfer reduces temperature gradients.

Why the others are wrong:

• A: Cooling avoids catalyst overheating, but specifies incoming mixture, not catalyst protection directly.
• B: Product cooling aids separation, but heat exchangers primarily transfer heat, not separate components.
• C: Warming speeds reactions via Arrhenius equation, but purpose here is cooling, not heating.

Final answer: D