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← ScienceWhich consequence results when a catalyst failure prevents sufficient _contact time_ for reactants traveling through an industrial packed bed reactor?
A)Increased unreacted reagent concentration downstream✓
B)Exothermic runaway due to fouling layers
C)Decreased surface area within the bed
D)Enhanced heat transfer from catalyst surface
💡 Explanation
A reduction in catalyst effectiveness lowers the reaction rate, because fewer reactants can properly undergo _surface adsorption_ and react therefore, results in a higher concentration of unreacted reagents in the product stream rather than complete conversion inside the reactor.
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