Understanding Hysteresis in Carbon Dioxide Sorption in Porous Metal–Organic Frameworks

Barsukova, Marina O.; Belosludov, Rodion V.; Kovalenko, Konstantin A.; Самсоненко, Д. Г.; Poryvaev, Artem S.; Sheveleva, Alena M.; Fedin, Matvey V.; Bogomyakov, A. S.; Dybtsev, Danil N.; Schröder, Martin; Федин, В. П.

doi:10.1021/acs.inorgchem.9b00016

Cited by 27 publications

(19 citation statements)

References 61 publications

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“…In general, microporous and mesoporous materials are able to capture low concentrations of small VOC molecules, and pore-filling occurs frequently at low partial pressure. Furthermore, to precisely evaluate the pore characteristics of Mg-MOFs, pore-size determination was carried out via nonlocal density functional theory methods [ 51 ]. The pore-size distributions are presented in figure 2 b .…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, the adsorption amount of β-pinene 144.42 mg g −1 was significantly higher than that of α-pinene, 18.32 mg g −1 . This may be attributed to the different position of C=C in the structure, which was the primary adsorption interaction between pinene and pyridine, because C=C was exposed to the β-pinene surface and was prone to chemical reactions, whereas C=C in α-pinene was inside the hexatomic ring and thus difficult to react chemically, although the molecular diameters were similar (0.72 nm of β-pinene versus 0.75 nm of α-pinene) [ 51 ]. In other words, steric hindrance greatly influences the adsorption effect.…”

Section: Resultsmentioning

confidence: 99%

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Facile synthesis of magnesium-based metal-organic framework with tailored nanostructure for effective volatile organic compounds adsorption

Liu

Zuo

et al. 2022

R. Soc. open sci.

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A novel Mg(II) metal-organic framework (Mg-MOF) was synthesized based on the ligand of 2,2'-bipyridine-4,4'-dicarboxylic acid. Single-crystal X-ray structural analysis confirmed that three-dimensional-nanostructure Mg-MOFs formed a monoclinic system with a channel size of 15.733 Å × 23.736 Å. N 2 adsorption isotherm, Fourier transform infrared spectroscopy, thermogravimetric analysis and high-resolution transmission electron microscopy were performed to characterize the thermal stability and purity of the Mg-MOFs. The adsorption studies on four typical volatile organic compounds (VOCs) emitted during wood drying showed that Mg-MOFs have noteworthy adsorption capacities, especially for benzene and β-pinene with adsorptions of 182.26 mg g −1 and 144.42 mg g −1 , respectively. In addition, the adsorption of Mg-MOFs mainly occurred via natural adsorption, specifically, multi-layer physical adsorption, accompanied by chemical forces, which occurred in the pores where the VOCs molecules combined with active sites. As an adsorbent, Mg-MOFs exhibit versatile behaviour for toxic gas accumulation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Facile synthesis of magnesium-based metal-organic framework with tailored nanostructure for effective volatile organic compounds adsorption

Liu

Zuo

et al. 2022

R. Soc. open sci.

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“…The latter example was demonstrated recently for a microporous MOF [Mn3(Hpdc)2(pdc)2] (pdc 2− = pyridine-2,4-dicarboxylate). 20 The compound 2 is also possessing type I(a) isotherm up to p/p0 = 0.5, where adsorption isotherm makes a small step. The desorption isotherm of 1 shows a large pseudo-triangular hysteresis of H2(a) type with an intermediate desorption step at p/p0 = 0.1.…”

Section: Resultsmentioning

confidence: 99%

Isomeric Scandium–Organic Frameworks with High Hydrolytic Stability and Selective Adsorption of Acetylene

et al. 2021

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Two solvent-controlled topological isomers of scandium-organic frameworks [Sc(Hpzc)) were synthesized using 2,5-pyrazinedicarboxylate. Despite the isomeric nature of the obtained MOFs they possess different structural features and unique adsorption properties towards gases and iodine. The compound 1 has widely spread among MOF's structures dia topology with ultra-narrow channels which together with inner surface functionalization leads to enhanced CO2 adsorption and high selectivity factors in CO2/CH4 and CO2/N2 gas mixtures (25.9 and 35.6, respectively, 1/1 v/v). Moreover, rare preferable adsorption of CO2 over C2H2 was demonstrated. The biporous isomeric framework 2 has crb topology inherent in zeolites. Remarkable adsorption affinity to C2H2 with the IAST selectivity factor of 127.1 for C2H2/C2H4 mixture (1/99 v/v) was achieved for 2. Both compounds have exceptional chemical stability in a wide range of pH from acidic to basic media.

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“…Using a modification of our reported PG‐DSC procedure, we determined the enthalpies of CO 2 adsorption and desorption for both MIL‐53(Al) and MOF‐508b at 288, 298 and 308 K in the context of thermal management; the isotherms are shown in blue in Figures and . In addition to the expected stepped profiles, the isotherms display considerable hysteresis . These were determined for the narrow (np) and large pore (lp) forms, associated with the structural transition.…”

Section: Figurementioning

confidence: 94%

Pressure‐Gradient Sorption Calorimetry of Flexible Porous Materials: Implications for Intrinsic Thermal Management

2020

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Thermal management is an important consideration for applications that involve gas sorption by flexible porous materials. A pressure-gradient differential scanning calorimetric method was developed to measure the energetics of adsorption and desorption both directly and continuously. The method was applied to the uptake and release of CO 2 by the well-known flexible metal-organic frameworks MIL-53(Al) and MOF-508b. High-resolution differential enthalpy plots and total integral enthalpy values for sorption allow comprehensive assessment of the thermal behavior of the materials throughout the entire sorption process. During adsorption, the investigated materials display the ability to offset exothermic adsorption enthalpy against endothermic structural transition enthalpy, and vice versa during desorption. The results show that flexible materials offer reduced total integral heat over a working range when compared to rigid materials.

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Understanding Hysteresis in Carbon Dioxide Sorption in Porous Metal–Organic Frameworks

Abstract: Understanding hysteresis in carbon dioxide sorption in porous metal-organic frameworks. Inorganic Chemistry.

Cited by 27 publications

References 61 publications

Facile synthesis of magnesium-based metal-organic framework with tailored nanostructure for effective volatile organic compounds adsorption

Facile synthesis of magnesium-based metal-organic framework with tailored nanostructure for effective volatile organic compounds adsorption

Isomeric Scandium–Organic Frameworks with High Hydrolytic Stability and Selective Adsorption of Acetylene

Pressure‐Gradient Sorption Calorimetry of Flexible Porous Materials: Implications for Intrinsic Thermal Management

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