{
  "abstract": "Microporous crystalline adsorbents such as zeolites, and metal-organic frameworks (MOFs) have potential use in a wide variety of separations applications. The evaluation of the separation performance requires the measurement of data on unary isotherms of the guest molecules in the microporous host materials; such measurements are usually conducted for a range of temperatures. The experimental data on the unary isotherms may be fitted with a variety of models such as 1-site Langmuir , 1-site Langmuir-Freundlich, and Dual-Site Langmuir-Freundlich (DSLF). The fitted isotherms are then used for calculation of the adsorption selectivity, , using the Ideal Adsorbed Solution Theory (IAST). The isotherm fits at different temperatures allow the determination of the isosteric heats of adsorption . By careful and detailed examination of the experimental data of more than sixty guest/host combinations at different temperatures, we conclude that the saturation capacities and Freundlich exponents are essentially temperature-independent. For any guest/host combination, the optimal fits of the sets of unary isotherm data at different temperatures are achieved by constraining the the saturation capacities and Freundlich exponents to be temperature-independent. Plotting the unary isotherm data at different temperatures as function of the surface potential results in a unique curve.",
  "abstract_shown": true,
  "affiliations": [
    "Van ‘t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Rajamani Krishna",
      "orcid": "0000-0002-4784-8530"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/969c4e725z549.bib",
  "cited_by": 5,
  "doi": "10.1016/j.rineng.2026.111813",
  "fulltext_url": null,
  "id": "969c4e725z549",
  "issns": [
    "2590-1230"
  ],
  "landing_url": "https://doi.org/10.1016/j.rineng.2026.111813",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1604|Metal-Organic Frameworks: Synthesis and Applications"
    ]
  ],
  "openalex": "W7166832492",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-01",
  "publisher": "Elsevier BV",
  "ris": "https://research.draconitic.com/paper/969c4e725z549.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T13:21:03Z",
      "native_id": "W7166832492",
      "source": "openalex",
      "url": "https://doi.org/10.1016/j.rineng.2026.111813"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1604|Metal-Organic Frameworks: Synthesis and Applications",
      "subfield": "inorganic"
    }
  ],
  "title": "Fitting of unary isotherms in MOFs and zeolites: Are saturation capacities and Freundlich exponents temperature-dependent?",
  "title_text": "Fitting of unary isotherms in MOFs and zeolites: Are saturation capacities and Freundlich exponents temperature-dependent?",
  "type": "peer-reviewed",
  "updated_at": "2026-11-04T13:21:03Z",
  "url": "https://research.draconitic.com/paper/969c4e725z549",
  "venue": "Results in Engineering",
  "versions": []
}