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← ScienceWhich risk increases when uncombusted methane reaches catalytic converter temperatures?
A)Aggressive catalytic reaction runaway will occur✓
B)Steam-induced catalyst grain sintering happens
C)Partial oxidation inhibits NOx reduction
D)Methane emission rate slowly self-corrects
💡 Explanation
Runaway (positive feedback) is promoted because the Arrhenius equation dictates that increasing temperatures dramatically increase reaction rates. Faster oxidation of uncombusted methane heats the catalyst further, therefore a runaway reaction will occur rather than controlled reactions or self-corrections at those high temperatures.
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