TY - JOUR
T1 - Adsorption of carbon dioxide, methane and nitrogen on an ultramicroporous copper metal-organic framework
AU - Wu, Xiaofei
AU - Yuan, Bin
AU - Bao, Zongbi
AU - Deng, Shuguang
N1 - Funding Information:
This project was partially supported by U.S. Air Force Research Laboratory (FA8650-11-C-2127), U.S. Department of Energy (DE-EE0003046), U.S. National Science Foundation (EEC 1028968), New Mexico State University Office of Vice President for Research (GREG award for X. Wu and j. Wang), and the Hengyi Fund of Zhejiang University (S. Deng).
PY - 2014/9/15
Y1 - 2014/9/15
N2 - An ultramicroporous copper metal-organic framework (Cu-MOF), Cu(hfipbb)(H2hfipbb)0.5 [H2hfipbb=4,4'-(hexafluoro-isopropylidene) bis(benzoic acid)] was successfully synthesized by a microwave-assisted method (1) with a shorter reaction time and higher MOFs yield. The obtained Cu-MOF sample was characterized with scanning electron microscopy for crystal structure, powder X-ray diffraction for phase structure, and carbon dioxide adsorption at 273K for pore textural properties. Single-component adsorption (adsorption equilibrium and kinetics) of CO2, CH4, and N2 on 1 was measured using a Micromeritics ASAP 2020 adsorption porosimeter at 278, 298 and 318K, and pressures up to 1bar. Isosteric heats of adsorption, Henry's constants, and diffusion time constants were calculated and carefully analyzed. Adsorption equilibrium selectivity (α), adsorbent selection parameter for pressure swing adsorption processes (S), kinetic selectivity and combined separation selectivity (β) for CO2/CH4, CO2/N2 and CH4/N2 binary mixtures were estimated based on the single-component adsorption data. The relative high values of the adsorption selectivities suggest that Cu-MOF is a promising adsorbent for separating CO2/CH4, CO2/N2 and CH4/N2 gas pairs.
AB - An ultramicroporous copper metal-organic framework (Cu-MOF), Cu(hfipbb)(H2hfipbb)0.5 [H2hfipbb=4,4'-(hexafluoro-isopropylidene) bis(benzoic acid)] was successfully synthesized by a microwave-assisted method (1) with a shorter reaction time and higher MOFs yield. The obtained Cu-MOF sample was characterized with scanning electron microscopy for crystal structure, powder X-ray diffraction for phase structure, and carbon dioxide adsorption at 273K for pore textural properties. Single-component adsorption (adsorption equilibrium and kinetics) of CO2, CH4, and N2 on 1 was measured using a Micromeritics ASAP 2020 adsorption porosimeter at 278, 298 and 318K, and pressures up to 1bar. Isosteric heats of adsorption, Henry's constants, and diffusion time constants were calculated and carefully analyzed. Adsorption equilibrium selectivity (α), adsorbent selection parameter for pressure swing adsorption processes (S), kinetic selectivity and combined separation selectivity (β) for CO2/CH4, CO2/N2 and CH4/N2 binary mixtures were estimated based on the single-component adsorption data. The relative high values of the adsorption selectivities suggest that Cu-MOF is a promising adsorbent for separating CO2/CH4, CO2/N2 and CH4/N2 gas pairs.
KW - Adsorption
KW - Carbon dioxide
KW - Cu-MOF
KW - Methane
KW - Microwave-assisted synthesis
KW - Nitrogen
KW - Separation
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U2 - 10.1016/j.jcis.2014.05.021
DO - 10.1016/j.jcis.2014.05.021
M3 - Article
AN - SCOPUS:84902348300
VL - 430
SP - 78
EP - 84
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
SN - 0021-9797
ER -