The structure of adsorbed CO2 in carbon nanopores: A neutron diffraction study (Conference presentation)

Steriotis, Th.A.Stefanopoulos, K.L.Kanellopoulos, N.K.Mitropoulos, A.C.Hoser, A.

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dc.contributor.authorSteriotis, Th.A.en
dc.contributor.authorStefanopoulos, K.L.en
dc.contributor.authorKanellopoulos, N.K.en
dc.contributor.authorMitropoulos, A.C.en
dc.contributor.authorHoser, A.en
dc.rightsDefault License-
dc.subjectActivated carbonen
dc.subjectCO2 adsorptionen
dc.subjectMicroporous mediaen
dc.subjectNeutron diffractionen
dc.titleThe structure of adsorbed CO2 in carbon nanopores: A neutron diffraction studyen
heal.generalDescriptionVolume 241, Issue 1-Mar , pp. 239-244en
heal.generalDescriptionNCSR Demokritos, Institute of Physical Chemistry, 153 10 Aghia Paraskevi Attikis, Athens, Greeceen
heal.generalDescriptionDepartment of Petroleum, Cavala's Institute of Technology, 65404 St. Loucas, Cavala, Greeceen
heal.generalDescriptionInstitut für Kristallographie, RWTH Aachen, Jagerstraße 17-19, D-52066, Aachen, Germanyen
heal.generalDescriptionIFF, Forschungszentrum Juelich, Juelich, Germanyen
heal.classificationCarbon dioxideen
heal.recordProviderΔεν υπάρχει πληροφορίαel
heal.bibliographicCitationΔεν υπάρχει πληροφορίαel
heal.abstractThe behaviour of CO2 adsorbed on a microporous carbon at a temperature slightly above the critical point, was studied by adsorption in conjunction with in situ neutron powder diffraction. The carbon sample was produced by carbonisation and activation of a polymer precursor and the experiment was carried out by means of a specially designed adsorption apparatus, directly mounted on the neutron diffractometer. The CO2 diffraction patterns provide evidence that the adsorbed phase is - at pressures well below the critical one - in a state comparable to high-pressure dense supercritical fluid or even bulk liquid. Furthermore, the features of the diffraction patterns are consistent with the presence of orientational correlations between adsorbed molecules. Even though, the scattering data cover a limited Q space and thus the overall resolution is rather poor, the radial distribution functions deduced at different equilibrium pressures, reveal differences, which could be attributed to changes in the arrangement of CO 2 molecules along the 308 K isothermal scan. The results are discussed and compared with permeability measurements as well as Monte Carlo calculations. © 2004 Elsevier B.V. All rights reserved.en
heal.conferenceNameColloids and Surfaces A: Physicochemical and Engineering Aspectsen
heal.type.enConference presentationen
heal.type.elΔημοσίευση σε συνέδριοel
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