Passage:
Submarine atmospheric monitoring systems employ catalytic burner units to eliminate trace hydrogen gas generated by lead-acid battery banks. Ambient air drawn into the burner assembly first passes through an activated charcoal filter to capture volatile organic contaminants that could poison the catalyst. The filtered air stream then enters the preheater chamber, where electric heating elements raise the sample temperature to exactly 280°C before it reaches the precious-metal catalyst bed. Once oxidized into water vapor, the treated air flows through a secondary heat exchanger that lowers the discharge temperature below 45°C prior to releasing the stream back into the ventilation ductwork.
Statement: According to the passage, electric heating elements in the preheater chamber raise the air sample temperature to 280°C prior to reaching the catalyst bed.
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