ISIS Neutron and Muon Source Data Journal

Study of pore-confined CO2 depletion below the bulk triple point

Abstract: Freezing of fluids confined at the nanoscale is of great importance for the understanding of their behaviour due to the confinement effects arising from the finite pore size and the surface forces. Experiments of confined fluids freezing on ordered mesoporous silicas have shown that they crystallise at a temperature below their bulk freezing point depending on the pore size. Surprisingly, our previous neutron measurements carried out at NIMROD showed that CO2 molecules confined in ordered porous silica (SBA-15), upon cooling below the bulk critical point (T3=216.6 K), neither freeze nor remain liquid, but escape from the pores. This depletion was for the first time observed. We are proposing to further investigate the behaviour of confined CO2 molecules, upon cooling, in silica samples with different pore structure (KIT-6) and pore size (MCM-48).

Principal Investigator: Dr Theodore Steriotis
Local Contact: Dr Tristan Youngs
Experimenter: Dr Konstantinos Stefanopoulos
Experimenter: Mr Christos Tampaxis
Local Contact: Dr Tom Headen
Experimenter: Dr Fotios Katsaros
Experimenter: Dr Andreas Sapalidis

DOI: 10.5286/ISIS.E.RB1620144

ISIS Experiment Number: RB1620144

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Theodore Steriotis et al; (2016): Study of pore-confined CO2 depletion below the bulk triple point, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1620144

Data is released under the CC-BY-4.0 license.