Structure of supercritical CO2 between 0 and 100°C for pressure between 50 and 250 bar
SuperCritical fluids based on CO2 have become increasingly used in many industrial sectors as they can lead to a drastic reduction of water consumption and, of expensive or toxic chemicals. A first series of neutron diffraction experiments demonstrated that the results exhibit a clear contribution at small angles around Q < 0.1 Å-1. In addition to the small-angle scattering signal, an additional oscillation is visible in the 0.4-0.5 Å-1, which will be helpful to discriminate between different possible models. At large angles, a broad maximum is clearly visible and seems to be composed of two contributions. Their relative intensity and position vary significantly depending on P and T conditions. The goal of the present project (in the continuity of the preceding one) is to base further analysis on 'pure liquid'; CO2 structures: - below the critical T of about 31°C, for pressure below and above the critical pressure, - above the critical T, for pressure well above 200 bar, where the SC structure seems to be homogenised. The 'pure liquid'; structure will be the starting point for the validation and understanding of the SC-CO2 structure where the two phases seems
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Saint-Antonin; CRISTIGLIO Viviana; CUELLO Gabriel; GEBEL Gerard; Lebaigue O.; MATSARSKAIA Olga; PONCELET Olivier and RENARD Olivier. (2021). Structure of supercritical CO2 between 0 and 100°C for pressure between 50 and 250 bar. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-02-606
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