Adsorption hysteresis

{
  "id": "MLC-T-CHM-000288",
  "term": "Adsorption hysteresis",
  "field": "Chemistry",
  "definition": "The phenomenon where the amount of gas adsorbed by a porous material at a given relative pressure during adsorption is different from the amount desorbed at the same relative pressure. This difference creates a loop in the adsorption-desorption isotherm, often attributed to capillary condensation and differences in pore filling and emptying mechanisms. It provides insights into the pore structure of the adsorbent.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "adsorption",
    "desorption",
    "hysteresis"
  ],
  "references": [
    "PAC, 1972, 31, 577. 'Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry' on page 585 (https://doi.org/10.1351/pac197231040577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/adsorption-hysteresis/"
}