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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/20030

Title: Immersion calorimetry: molecular packing effects in micropores
Authors: Madani, S. Hadi
Silvestre-Albero, Ana
Biggs, Mark J.
Rodríguez-Reinoso, Francisco
Pendleton, Phillip
Issue Date: 2015
Publisher: © Wiley-VCH Verlag
Citation: MADANI, S.H. ...et al., 2015. Immersion calorimetry: molecular packing effects in micropores. ChemPhysChem, 16(18), pp. 3984–3991.
Abstract: Repeated 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.
Description: This paper is in closed access.
Sponsor: This paper was funded by the Australian Research Council discovery program (DP110101293).
Version: Published
DOI: 10.1002/cphc.201500580
URI: https://dspace.lboro.ac.uk/2134/20030
Publisher Link: http://dx.doi.org/10.1002/cphc.201500580
ISSN: 1439-4235
Appears in Collections:Closed Access (Chemistry)

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