Characterisation of metal organic frameworks for adsorption cooling

Rezk, Ahmed; Al-Dadah, Raya; Mahmoud, Saad; Elsayed, Ahmed

doi:10.1016/j.ijheatmasstransfer.2012.07.068

Cited by 128 publications

(61 citation statements)

References 36 publications

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“…Concerning the high temperature source, T H , as, recently, the research is oriented towards the reduction of the heating temperature for adsorptive machines (e.g. solar cooling [19,20], mobile applications [21]), it was fixed at 90 C both for air conditioning and heat pumping cycles.…”

Section: Resultsmentioning

confidence: 99%

Novel experimental methodology for the characterization of thermodynamic performance of advanced working pairs for adsorptive heat transformers

Frazzica

Aristov

Freni

2014

Applied Thermal Engineering

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Section: Resultsmentioning

confidence: 99%

Novel experimental methodology for the characterization of thermodynamic performance of advanced working pairs for adsorptive heat transformers

Frazzica

Aristov

Freni

2014

Applied Thermal Engineering

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“…The samples were scanned from 3 to 30° 2θ with a step size of 0.02°. Water adsorption characteristics were measured using a dynamic vapour sorption (DVS) gravimetric analyser (Advantage DVS, Surface Measurement Systems, UK) using the methodology previously described [5].…”

Section: Materials Characterizationmentioning

confidence: 99%

“…Jeremias et al [4] synthesized a coating of microporous aluminium fumarate on a metal substrate via the thermal gradient approach, which was stable for over 4500 water vapour adsorption/desorption cycles showing its potential to be used in heat transformation applications. Rezk et al [5,6] compared the performance of HKUST-1 and MIL-100(Fe) to silica gel showing that HKUST-1 outperformed silica gel RD-2060 with 93.2% higher water uptake, while MIL-100(Fe) showed an increase of 26.8%. The authors suggested that using these two MOFs can lead to a considerable increase in the refrigerant flow rate, the cooling capacity and eventually reduction in the size of the adsorption system.…”

Section: Introductionmentioning

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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“…So far, only a few theoretical [28] and experimental investigations [32][33][34] on the stability of HKUST-1 have been reported. BET surface area of HKUST-1 was found to decrease by 52% (from 1340 to 647 m 2 g À1 ) after an extreme water stability test, i.e.…”

Section: Introductionmentioning

confidence: 99%