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← ScienceWhich outcome occurs when humidity increases in refining?
A)Zeolite catalyst sites undergo deactivation✓
B)Refined product octane number increases
C)Endothermic cracking reactions accelerate
D)Reactor pressure differential remains constant
💡 Explanation
Zeolite deactivation occurs because water from humidity competes for active catalyst adsorption sites, it poisons the catalyst. This is called Competitive Inhibition, thus catalyst activity decreases rather than cracking accelerating or octane increasing; differential changes can occur with flow.
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