Modelling excess surface energy in dry and wetted calcite systems |
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Authors: | Bjørn Kvamme Tatyana Kuznetsova Daniel Uppstad |
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Institution: | (1) Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK;(2) Department of Engineering Systems, London South Bank University, London, SE1 0AA, UK |
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Abstract: | We have combined the calcite force field of Hwang et al. (J. Phys. Chem. B 105:4,122–4,127, 2001) with the F3C water model
and a hybrid Lennard-Jones/van der Waals 3-site potential for CO2 to investigate the (10`1]4){\left({10\overline14}\right)} and ( 10`1]0){\left( {10\overline10}\right)} cleaving surfaces of calcite under dry and wetted conditions. The wetting fluid included both pure water and water–carbon
dioxide mixture. Excess surface energies and structural features of the calcite–fluid interface were analyzed, with the simulation
results for the relaxed surfaces confirming the experimentally observed morphology and supporting our conclusion that the
relative stability order of calcite cleaving surfaces under investigation will remain unchanged in the presence of water–carbon
dioxide mixture as well. |
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Keywords: | |
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