Which mechanism causes a solid catalyst's effectiveness to diminish over time in a chemical reactor?

💡 Explanation

When reactant stream impurities adsorb strongly to the catalyst surface, catalyst poisoning occurs because the active sites are blocked irreversibly, preventing reactant binding and reducing catalytic activity. Therefore catalyst poisoning results, rather than phase transition, saturation, or reduced pressure effects which depend on different physical properties.

• Which outcome occurs when a pulsed laser anneals polysilicon?
• Which consequence results when exceeding a crystal lattice's shear tolerance?
• Which outcome occurs within a Haber-Bosch reactor if gaseous reactants' delivery falls below required stoichiometric proportions?
• Which consequence results when reciprocating engines experience insufficient oil film?
• Which outcome accompanies increased agitator speed in crystallizer?
• Which limitation arises due to spacetime curvature near orbiting pulsars?