Catalyst decay

{
  "id": "MLC-T-CHM-001707",
  "term": "Catalyst decay",
  "field": "Chemistry",
  "definition": "The decline over time in the activity or selectivity of a catalyst during a chemical reaction. This loss of performance can result from several mechanisms, including poisoning by impurities in the feed, fouling by coke or other deposits, thermal degradation, or mechanical loss of the catalytic material. Catalyst decay is a major consideration in industrial processes, requiring periodic regeneration or replacement of the catalyst.",
  "synonyms": [
    "catalyst deactivation"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "catalyst"
  ],
  "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/catalyst-decay/"
}