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← ScienceWhich risk increases when water enters the molecular sieve of a cryogenic air separation unit?
A)Adsorbent swelling and bed cracking✓
B)Refrigerant overcooling, reduced component separation
C)Catalyst poisoning, decreased oxygen production
D)Valve fouling and overall process overheating
💡 Explanation
Adsorbent destruction occurs because ice formation within the sieve pores causes structural stress via volume expansion; this mechanism is called cryogenic fracturing. Therefore, bed cracking risk increases rather than mere component reduction because physical damage propagates within the molecular sieve.
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