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Critical Point of Fluid Confined in Nanopores: Experimental Detection and Measurement

Author:
Tan, Sugata P., Qiu, Xingdong, Dejam, Morteza, Adidharma, Hertanto
Source:
Journal of physical chemistry 2019 v.123 no.15 pp. 9824-9830
ISSN:
1932-7455
Subject:
carbon dioxide, differential scanning calorimetry, ethane, heat, nanopores, physical chemistry, prediction
Abstract:
For the first time, the presence of the critical point (CP) of fluids confined in nanopores is unambiguously demonstrated and measured using a differential scanning calorimeter with an isochoric cooling procedure. The behavior of the CP of CO₂ and C₂H₆ in SBA-15 is found to deviate from theoretical predictions. The heat involved in capillary condensation is also discussed. The new and simple method of measurement introduced in this study opens the way to further investigate the criticality of fluids confined in nanopores.
Agid:
6375147