Adsorption Property of Mg-MOF-74 for CO2/H2O†

doi:10.7503/cjcu20160584

Abstract

Abstract:

Mg-MOF-74 was synthesized through a solvothermal method using Mg(NO₃)₂·6H₂O and 2,5-dihydroxyterephthalic acid as raw materials. The product was then characterized via X-ray diffraction(XRD), Fourier transform infrared(FTIR) spectroscopy, scanning electron microscopy(SEM) and breakthrough experiments. The results show that pure Mg-MOF-74 with complete structure, regular morphology and excellent CO₂ adsorption properties was prepared. It is confirmed in breakthrough experiments that the as-synthesized Mg-MOF-74 maintains a high CO₂ adsorption properties in the presence of H₂O. Therefore, the prepared Mg-MOF-74 is a suitable candidate for capturing CO₂ from wet flue gas stream.

Key words: Mg-MOF-74, Breakthrough experiment, CO₂/H₂O binary adsorption

CLC Number:

O647
O614

TrendMD:

DU Tao, LONG Yuan, TANG Qi, LI Shenglu, LIU Liying. Adsorption Property of Mg-MOF-74 for CO₂/H₂O^†[J]. Chem. J. Chinese Universities, 2017, 38(2): 225.

Figures/Tables 7

Fig.1 Schematic diagram of experimental apparatus

Fig.2 XRD patterns of Mg-MOF-74

Fig.3 SEM image of Mg-MOF-74

Fig.4 FTIR spectrum of Mg-MOF-74

Fig.5 CO2 adsorption curves of Mg-MOF-74 at 30 ℃(a) and 60 ℃(b)

Fig.6 Water breakthrough curves of Mg-MOF-74(a) and zeolite 13X(b)Triangles represent breakthrough point, squares represent saturated point.

Fig.7 H2O/CO2 breakthrough curve of Mg-MOF-74 Relative humidity: a. 12%; b. 19%.

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Adsorption Property of Mg-MOF-74 for CO₂/H₂O^†

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