How Does Bulk Poisoning Differ from Surface Poisoning?
While surface poisoning involves the adsorption of impurities on the catalyst's surface, bulk poisoning entails the penetration of impurities into the catalyst's bulk structure. Surface poisoning typically affects the outermost layers and can sometimes be reversed by cleaning or regeneration techniques. In contrast, bulk poisoning often results in irreversible deactivation due to the deep integration of impurities within the catalyst.
