Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above _____________ °C, because corrosion prevails at higher temperatures?
Correct answer: B. 750
- A. 350
- B. 750
- C. 1050
- D. 1250
Explanation
Metallic recuperators are generally limited to about 750°C because oxidation and high-temperature corrosion become severe above this range. Ceramic recuperators are preferred for hotter flue gases.
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