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Updated: Apr 1, 2026
09:31
Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
Published on: March 27, 2019
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Surface-Sensitive Characterization of Nujol Interaction with CaCO3 (104) Surfaces.
Lanna I M Sinimbu1, Jesana M Loreto1, Maria Luiza Dorneles1
1Brazilian Center for Research in Physics (CBPF), Rio de Janeiro-RJ, Brazil.
Summary
This study shows how water changes the surface of calcite, affecting how oil molecules like n-dodecane (Nujol) stick to it. Understanding this interaction is key for improving oil recovery technologies.
Area of Science:
- Surface Science
- Materials Chemistry
- Petroleum Engineering
Background:
- Understanding hydrocarbon-calcite interactions is crucial for optimizing oil recovery processes.
- Surface properties of calcium carbonate (CaCO3) significantly influence wettability and oil adhesion.
- Hydration effects on mineral surfaces can alter their chemical composition and reactivity.
Purpose of the Study:
- To investigate the adsorption behavior of Nujol (n-dodecane) on pristine and hydrated CaCO3 (104) surfaces.
- To elucidate the role of surface hydration on the chemical composition and topography of calcite.
- To correlate molecular binding geometry with film formation and surface properties.
Main Methods:
- Atomic Force Microscopy (AFM) for surface topography analysis.
- X-ray Photoelectron Spectroscopy (XPS) for chemical composition determination.
- Infrared Reflection-Absorption Spectroscopy (IRRAS) for molecular binding geometry investigation.
Main Results:
- Hydration leads to a Ca2+-deficient calcite surface due to dissolution, observed via AFM and XPS.
- Nujol forms a continuous film on pristine calcite but a discontinuous film on hydrated calcite.
- IRRAS analysis revealed distinct molecular binding geometries corresponding to different film topographies.
Conclusions:
- Surface hydration significantly modifies the hydrocarbon molecule-calcite interaction.
- Altering surface composition and hydration levels can optimize oil adhesion for improved wettability alteration.
- Findings are essential for enhancing oil recovery processes by controlling surface properties.
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