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Title: Impact of alkali‐metal impregnation on MIL‐101 (Cr) metal‐organic frameworks for CH4 and CO2 adsorption studies
Authors: Kayal, Sibnath
Chakraborty, Anutosh
Keywords: Engineering::Mechanical engineering
Issue Date: 2018
Source: Kayal, S., & Chakraborty, A. (2018). Impact of alkali‐metal impregnation on MIL‐101 (Cr) metal‐organic frameworks for CH4 and CO2 adsorption studies. ChemPhysChem, 19(22), 3158-3165. doi:10.1002/cphc.201800526.
Journal: ChemPhysChem
Abstract: In this article, an assessment of the impact of alkali-metal-ion impregnation on metal-organic frameworks (MOF) is presented employing CH4 and CO2 adsorption isotherm data. At first, the parent MOF, MIL-101(Cr), is prepared by a fluorine-free hydrothermal reaction procedure and impregnated with Li, Na, and K alkali cations. These synthesised MOFs are characterized by N2 adsorption/desorption isotherm analysis, X-ray diffraction (XRD) measurement and scanning electron microscopy (SEM). The amount of CH4 and CO2 adsorption uptakes onto parent and alkali ions impregnated MIL-101(Cr) are conducted for wide ranges of pressures and temperatures. For understanding the effects of MOF synthesis process and alkali cations impregnation, CH4 /CO2 uptakes on perfect crystalline MIL-101(Cr) MOF are also calculated by Grand Canonical Monte Carlo (GCMC) simulation and the results are compared with experimental isotherm data of synthesised parent and alkali ions impregnated MIL-101(Cr) MOFs. It is found that the limiting uptakes and the isosteric heats are mainly influenced by the modified adsorbent structures due to alkali ions impregnation and the polarity of adsorbate molecules. Employing Dubinin-Astakhov (DA) equation, the energy distribution of synthesised parent and alkali doped MIL-101 (Cr) MOFs are also presented to identify the alkali cation effects and the surface heterogeneity.
ISSN: 1439-7641
DOI: 10.1002/cphc.201800526
Rights: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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