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Modeling of n-Alkanes on Calcite/Dolomite by Molecular Dynamics Simulations and First-Principles Calculations
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2021-08-08 , DOI: 10.1002/adts.202100226 Huifang Li 1 , Hakkim Vovusha 1 , Sitansh Sharma 1 , Nirpendra Singh 1 , Udo Schwingenschlögl 1
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2021-08-08 , DOI: 10.1002/adts.202100226 Huifang Li 1 , Hakkim Vovusha 1 , Sitansh Sharma 1 , Nirpendra Singh 1 , Udo Schwingenschlögl 1
Affiliation
Using a combination of molecular dynamics simulations and first-principles calculations, the interaction of n-alkanes with calcite/dolomite is investigated. It is observed that the n-alkane molecules align preferentially parallel to the interface, despite interaction by weak physisorption, and give rise to distinct adsorption layers. The ordering turns out to be more pronounced on calcite than dolomite due to a smaller average velocity of the n-alkane molecules. The observations are explained in terms of adsorption energies and charge transfers. The results show that functionalization is no prerequisite of structural ordering and a distinct mass density profile perpendicular to the interface.
中文翻译:
通过分子动力学模拟和第一性原理计算模拟方解石/白云石上的正构烷烃
结合分子动力学模拟和第一性原理计算,正构烷烃与方解石/白云石进行了研究。据观察,尽管通过弱物理吸附相互作用,正构烷烃分子优先平行于界面排列,并产生不同的吸附层。由于正构烷烃分子的平均速度较小,方解石的排序比白云石更明显。观察结果是根据吸附能和电荷转移来解释的。结果表明,功能化不是结构有序和垂直于界面的明显质量密度分布的先决条件。
更新日期:2021-09-07
中文翻译:
通过分子动力学模拟和第一性原理计算模拟方解石/白云石上的正构烷烃
结合分子动力学模拟和第一性原理计算,正构烷烃与方解石/白云石进行了研究。据观察,尽管通过弱物理吸附相互作用,正构烷烃分子优先平行于界面排列,并产生不同的吸附层。由于正构烷烃分子的平均速度较小,方解石的排序比白云石更明显。观察结果是根据吸附能和电荷转移来解释的。结果表明,功能化不是结构有序和垂直于界面的明显质量密度分布的先决条件。