Which outcome impairs catalytic converter function when exposed to high concentration of molecular sulphur dioxide (SO2)?

💡 Explanation

When exposed to high SO2 concentrations, surface poisoning occurs because SO2 molecules adsorb strongly to active metal sites in the catalyst, blocking reactant access lowering conversion efficiency. Surface poisoning impairs conversion efficiency, rather than thermal runaway, cracking, or material leaching which require different mechanisms.

• Which mechanism reduces nitric oxide (NO) emissions in catalytic converters of combustion engines?
• Which consequence results when a solid catalyst prematurely deactivates?
• Which consequence results when a poorly conditioned Kalman filter diverges?
• Which mechanism causes signal attenuation when electromagnetic waves propagate through humid air?
• Which consequence results when a thorium nuclear power plant's coolant flow is suddenly lost?
• Which outcome occurs when exceeding magnetic critical field strength for superconducting electromagnet coils?