MOF-5 composites exhibiting improved thermal conductivity

Liu, D.; Purewal, Justin; Yang, Jun; Sudik, Andrea; Maurer, Stefan; Muêller, U.; Ni, Jun; Siegel, Donald J.

doi:10.1016/j.ijhydene.2011.12.129

Cited by 136 publications

(131 citation statements)

References 34 publications

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“…A molecular simulation study was conducted by Zhang et al [27] to calculate the thermal conductivity of zeolitic imidazolate framework (ZIF-8). It was reported that the thermal conductivity varies from 0.165 to 0.190 W (m K) −1 in the temperature range of 300 to 1000 K. The thermal conductivity has been experimentally measured for MOF-5 [28] and found to be only 0.1 W (m K) −1 at room temperature. The low thermal conductivity was enhanced through the use of the thermally conductive Expanded Natural Graphite (ENG); the addition of 10 wt % ENG resulted in a five folds enhancement in the thermal conductivity relative to neat MOF-5, increasing it from 0.10 to 0.56 W (m K) −1 .…”

Section: Kumar Et Almentioning

confidence: 99%

Development of MIL-101(Cr)/GrO composites for adsorption heat pump applications

Elsayed

Wang

Anderson

et al. 2017

Microporous and Mesoporous Materials

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Adsorption heat pumps can be used for generating heating, cooling, seasonal energy storage and water desalination applications. Metal-organic frameworks (MOFs) are hybrid porous materials with high surface area and superior adsorption characteristics compared to conventional adsorbents. MIL-101(Cr) has a large pore size with water vapour adsorption capacity up to 1.5 gH2O gads -1 and high cyclic stability thus has the potential to be used in adsorption heat pumps. This work investigates the enhancement of the thermal conductivity and water adsorption characteristics of MIL-101(Cr) using hydrophilic graphene oxide. Two methods have been used to develop MIL-101(Cr)/GrO composites. The first method was through physical mixing between MIL-101(Cr) and GrO while the other was through incorporating the GrO during the synthesis process of MIL-101(Cr). The composites and MIL-101(Cr) were characterized in terms of their structure, water adsorption uptake, BET surface area, particle size, thermal gravimetric analysis, SEM images and thermal conductivity measurements. Results showed that introducing low amounts of GrO (<2%) to the neat MIL-101(Cr) enhanced the water adsorption characteristics at high relative pressure but enhanced the heat transfer properties by 20-30% while using more than 2% of GrO reduced the water adsorption uptake but significantly enhanced the thermal conductivity by more than 2.5 times.

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Section: Kumar Et Almentioning

confidence: 99%

Development of MIL-101(Cr)/GrO composites for adsorption heat pump applications

Elsayed

Wang

Anderson

et al. 2017

Microporous and Mesoporous Materials

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“…Yet, adding binders also reduces the percentage of MOF in a shaped structure on a mass basis. The shaped structure must prevent external diffusion limitation, facilitate mass transport, and also possess good mechanical strength to resist abrasion [12]. To date, very few studies are systematic in determining the effect of binders on physical properties (surface area, pore volume, hardness) of the resulting composites and relating these properties to hydrogen storage performance.…”

Section: Introductionmentioning

confidence: 99%

A more efficient way to shape metal-organic framework (MOF) powder materials for hydrogen storage applications

Ren

Musyoka

Langmi

et al. 2015

International Journal of Hydrogen Energy

142

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“…The effective thermal conductivity of MOF-5 powders is less than the single-crystal value because of their large pore sizes and high free volumes. Purewal et al [6,7] adopted two representative ways to increase the effective thermal conductivity of MOF-5 powders in a storage tank. The first method is powder densification, which can yield a 350% increase in volumetric H2 density compared with powders with a density of 0.5 g/cm 3 .…”

Section: Introductionmentioning

confidence: 99%

“…The porosity of the MOF-5 powder bed will decrease with an increase in pressure, as shown in Figure 1b. In this work, the following assumptions are made: the pore in the crystal does not experience the collapse phenomenon at the study pressure range (0.01-50 MPa), and the relation between density and pressure is linear [7]. This relationship is expressed as …”

Section: Introductionmentioning

confidence: 99%

Effective Thermal Conductivity of MOF-5 Powder under a Hydrogen Atmosphere

Wang

Wen

et al. 2015

Computation

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Abstract:Effective thermal conductivity is an important thermophysical property in the design of metal-organic framework-5 (MOF-5)-based hydrogen storage tanks. A modified thermal conductivity model is built by coupling a theoretical model with the grand canonical Monte Carlo simulation (GCMC) to predict the effect of the H2 adsorption process on the effective thermal conductivity of a MOF-5 powder bed at pressures ranging from 0.01 MPa to 50 MPa and temperatures ranging from 273.15 K to 368.15 K. Results show that the mean pore diameter of the MOF-5 crystal decreases with an increase in pressure and increases with an increase in temperature. The thermal conductivity of the adsorbed H2 increases with an increased amount of H2 adsorption. The effective thermal conductivity of the MOF-5 crystal is significantly enhanced by the H2 adsorption at high pressure and low temperature. The effective thermal conductivity of the MOF-5 powder bed increases with an increase in pressure and remains nearly unchanged with an increase in temperature. The thermal conductivity of the MOF-5 powder bed increases linearly with the decreased porosity and increased thermal conductivity of the skeleton of the MOF-5 crystal. The variation in the effective thermal conductivities of the MOF-5 crystals and bed mainly results from the thermal conductivities of the gaseous and adsorption phases.

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MOF-5 composites exhibiting improved thermal conductivity

Cited by 136 publications

References 34 publications

Development of MIL-101(Cr)/GrO composites for adsorption heat pump applications

Development of MIL-101(Cr)/GrO composites for adsorption heat pump applications

A more efficient way to shape metal-organic framework (MOF) powder materials for hydrogen storage applications

Effective Thermal Conductivity of MOF-5 Powder under a Hydrogen Atmosphere

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