Temporary poisoning

{
  "id": "MLC-T-CHM-011863",
  "term": "Temporary poisoning",
  "field": "Chemistry",
  "definition": "A reversible reduction in the activity of a catalyst caused by a substance that adsorbs strongly to the active sites without undergoing a chemical transformation. Unlike permanent poisoning, the interaction between the poison and the catalyst surface is not irreversible. The original catalytic activity can be restored by removing the adsorbed poison, for instance by increasing the temperature or decreasing the partial pressure of the poisonous substance in the feed stream.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "adsorption",
    "poison"
  ],
  "references": [
    "PAC, 1976, 46, 71. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units - Appendix II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II: Heterogeneous Catalysis' on page 83 (https://doi.org/10.1351/pac197646010071)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/temporary-poisoning/"
}