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

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Stefanopoulos KL, Katsaros FK, Steriotis TA, Sapalidis AA, Thommes M, Bowron DT, Youngs TGA
Zeitschrift: Physical Review Letters
Jahr der Veröffentlichung: 2016
Band: 116
Heftnummer: 2
Seitenbereich: 025502
ISSN: 0031-9007


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)]


Einrichtungen weiterer Autorinnen und Autoren

National Centre for Scientific Research (NCSR) "Demokritos"
Quantachrome Instruments
Rutherford Appleton Laboratory


Zitierweisen

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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