File(s) under permanent embargo
Reason: This item is currently closed access.
Immersion calorimetry: molecular packing effects in micropores
journal contribution
posted on 2016-01-14, 13:25 authored by S. Hadi Madani, Ana Silvestre-Albero, Mark Biggs, Francisco Rodriguez-Reinoso, Phillip PendletonRepeated and controlled immersion calorimetry experiments were performed to determine the specific surface area and pore-size distribution (PSD) of a well-characterized, microporous poly(furfuryl alcohol)-based activated carbon. The PSD derived from nitrogen gas adsorption indicated a narrow distribution centered at 0.57±0.05 nm. Immersion into liquids of increasing molecular sizes ranging from 0.33 nm (dichloromethane) to 0.70 nm (α-pinene) showed a decreasing enthalpy of immersion at a critical probe size (0.43–0.48 nm), followed by an increase at 0.48–0.56 nm, and a second decrease at 0.56–0.60 nm. This maximum has not been reported previously. After consideration of possible reasons for this new observation, it is concluded that the effect arises from molecular packing inside the micropores, interpreted in terms of 2D packing. The immersion enthalpy PSD was consistent with that from quenched solid density functional theory (QSDFT) analysis of the nitrogen adsorption isotherm.
Funding
This paper was funded by the Australian Research Council discovery program (DP110101293).
History
School
- Science
Department
- Chemistry
Published in
ChemPhysChemPages
n/a - n/aCitation
MADANI, S.H. ...et al., 2015. Immersion calorimetry: molecular packing effects in micropores. ChemPhysChem, 16(18), pp. 3984–3991.Publisher
© Wiley-VCH VerlagVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This paper is in closed access.ISSN
1439-4235Publisher version
Language
- en