Anomalous Depletion of Pore-Confined Carbon Dioxide upon Cooling below the Bulk Triple Point: An In Situ Neutron Diffraction Study

Stefanopoulos KL, Katsaros FK, Steriotis TA, Sapalidis AA, Thommes M, Bowron DT, Youngs TGA (2016)


Publication Type: Journal article, Original article

Subtype: other

Publication year: 2016

Journal

Book Volume: 116

Pages Range: 025502

Journal Issue: 2

DOI: 10.1103/PhysRevLett.116.025502

Abstract

The phase behavior of sorbed CO{2} in an ordered mesoporous silica sample (SBA-15) was studied by neutron diffraction. Surprisingly, upon cooling our sample below the bulk critical point, confined CO{2} molecules neither freeze nor remain liquid as expected, but escape from the pores. The phenomenon has additionally been confirmed gravimetrically. The process is reversible and during heating CO{2} refills the pores, albeit with hysteresis. This depletion was for the first time observed in an ordered mesoporous molecular sieve and provides new insight on the phase behavior of nanoconfined fluids.[on SciFinder (R)]

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APA:

Stefanopoulos, K.L., Katsaros, F.K., Steriotis, T.A., Sapalidis, A.A., Thommes, M., Bowron, D.T., & Youngs, T.G.A. (2016). Anomalous Depletion of Pore-Confined Carbon Dioxide upon Cooling below the Bulk Triple Point: An In Situ Neutron Diffraction Study. Physical Review Letters, 116(2), 025502. https://dx.doi.org/10.1103/PhysRevLett.116.025502

MLA:

Stefanopoulos, K. L., et al. "Anomalous Depletion of Pore-Confined Carbon Dioxide upon Cooling below the Bulk Triple Point: An In Situ Neutron Diffraction Study." Physical Review Letters 116.2 (2016): 025502.

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