Adsorption of polar aromatic hydrocarbons on synthetic calcite

Lene Madsen, Laila Grahl-Madsen, Christian Grøn, Ida Lind, John Engell

    Research output: Contribution to journalJournal articleResearchpeer-review


    The wettability of hydrocarbon reservoirs depends on how and to what extent the organic compounds are adsorbed onto the surfaces of calcite, quartz and clay. A model system of synthetic call cite, cyclohexane and the three probe molecules: benzoic acid, benzyl alcohol and benzylamine, have been studied by adsorption experiments. The results clearly demonstrate the differences in the adsorption behaviour between probes with different functional groups of varying polarity and acidity. The maximum adsorption decreases in the order: benzoic acid, benzyl alcohol and benzylamine. The order of magnitude of Delta G degrees for the adsorption process implies the formation of a strong bond between the calcite surface and the adsorbate molecules. Copyright (C) 1996 Elsevier Science Ltd.
    Original languageEnglish
    JournalOrganic Geochemistry
    Issue number12
    Pages (from-to)1151-1155
    Publication statusPublished - Dec 1996


    • adsorption of polar compounds
    • wettability of chalk


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