AI Article Synopsis
- The study identifies a novel structural change in methane that is adsorbed in micropores, characterized by the probability distribution of where the molecules are likely to be located.
- Using the Monte Carlo method, researchers modeled how these structural transformations occur, noting that the methane molecules primarily cluster around areas of high probability for adsorption.
- The transformation behaves differently based on temperature and pressure, with a distinct shift from a discontinuous to a continuous nature as conditions change, representing a unique state of matter that lies between solid and liquid.
Article Abstract
We report a new type of structural transformation occurring in methane adsorbed in micropores. The observed methane structures are defined by probability distributions of molecular positions. The mechanism of the transformation has been modeled using Monte Carlo method. The transformation is totally determined by a reconstruction of the probability distribution functions of adsorbed molecules. The methane molecules have some freedom to move in the pore but most of the time they are confined to the positions around the high probability adsorption sites. The observed high-probability structures evolve as a function of temperature and pressure. The transformation is strongly discontinuous at low temperature and becomes continuous at high temperature. The mechanism of the transformation is influenced by a competition between different components of the interaction and the thermal energy. The methane structure represents a new state of matter, intermediate between solid and liquid.
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| http://dx.doi.org/10.1002/anie.201708993 | DOI Listing |
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