Which risk increases when a catalytic converter cools?

💡 Explanation

Reduced temperature reduces the rate of reaction because of lower thermal energy and thus lower surface reaction probability which decreases catalytic performance, thus the temperature is designed to be kept very high. The lower temperature decreases performance rather than catalyst failure therefore incomplete combustion byproducts pass through.

• Which risk increases when the evaporator of a refrigeration system undergoes a two-phase transition near its critical point?
• Which outcome results when band structure changes during extreme compression of silicon?
• Which outcome results when a polymer composite material is subjected to sustained tensile stress in a humid environment?
• Which consequence results when antibonding orbitals become significantly populated?
• Which consequence results when total internal reflection fails in a fiber optic cable?
• Which consequence results when the rate constant of a catalytic ammonia synthesis reactor decreases significantly?