Which mechanism causes a packed bed reactor with a deactivated catalyst to exhibit increased pressure drop?

💡 Explanation

When a catalyst deactivates, reactants may begin to polymerize on the catalyst surface, agglomerating into larger clumps that physically block the spaces between catalyst particles, increasing pressure drop. Therefore agglomeration results in increased pressure drop rather than sintering, lower temperature, or viscosity change which don't directly obstruct flow.

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