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

Ren, Jianwei; Musyoka, Nicholas M.; Langmi, Henrietta W.; Swartbooi, Ashton M; North, Brian C; Mathe, Mkhulu

doi:10.1016/j.ijhydene.2015.02.011

Cited by 142 publications

(95 citation statements)

References 20 publications

(13 reference statements)

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“…Currently, the traditional methods of storage include either compressing or liquefying hydrogen, which are limited by being highly energy demanding, inefficient, and relatively unsafe (Xiao et al 2014). Meanwhile, there has been a lot of research related to hydrogen adsorbed by metal hydride materials (Rango et al 2016), carbon materials (Zhao et al 2012b(Zhao et al , 2013Sethia and Sayari 2016), and MOF (Ren et al 2015) by physisorption or chemisorption. Among others, introduced into a nickel crucible and heat-treated in a muffle furnace (KDF, at a constant heating rate (3 °C/min) up to the final activation temperature (T=800 °C), which was maintained for 2 h. The crucible was then allowed to cool down to room temperature.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Bamboo-Based Activated Carbons with Super-High Specific Surface Area for Hydrogen Storage

et al. 2017

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Activated carbons (ACs) were developed from the agricultural by-products of moso bamboo by pyrolysis carbonization and the KOH activation process. N2 adsorption-desorption at 77 K, thermogravimetric analysis (TG), X-ray photoelectron spectrometry (XPS), element analysis (EA), Xray diffraction (XRD), scanning electron microscopy (SEM), highresolution transmission electron microscopy (HRTEM), and Fourier transform infrared spectroscopy (FTIR) were used to investigate the synthesis process, the impact of the weight ratio of KOH/bamboo charcoal (BC), and the characteristics of the bamboo charcoal and ACs produced. The results showed that the developed bamboo ACs achieved surface areas (SBET) as high as 3208 m 2 /g and micropores volumes (VDR) as high as 1.01 cm 3 /g. The carbonation and activation of the bamboo resulted in the enhancement of the microstructure of the bamboo ACs, and hence improvements in the sorption behavior and storage capacity. The highest hydrogen storage capacities achieved were 6.6 wt.% at 4 MPa and 2.74 wt.% at 1 bar, both at 77 K, which were much higher than those of a wellknown commercial activated carbon.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Bamboo-Based Activated Carbons with Super-High Specific Surface Area for Hydrogen Storage

et al. 2017

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“…This method potentially involves various transformations and processes for the shaped bodies from powder forms because of the simultaneous occurrence of wetting/drying, growth/breakage, binding/segregation, and so on. For example, shear-mixer-type granulators typically operate with mechanical impellers at speeds that transfer the shear stress to the wetted powders [47]. Roller compactors also transfer the mechanical stress by rolling of the materials.…”

Section: Granulationmentioning

confidence: 99%

“…It was possible to use the interface between the immiscible liquids as the template for the MOF shaping. In the absence of a support, freestanding MOF layers were obtained that could be shaped into hollow capsules by droplet templating [47,48].…”

Section: Granulationmentioning

confidence: 99%

“…The combination of high sphere density and low reduction of WSSA is desirable from a process volume viewpoint for chemical engineering and industrial applications. Recently, shaping of Zr-MOF powder into spheres with diameters of 0.5-15 mm in the presence of 10 wt% sucrose as a binder was demonstrated by Ren and coworkers [47] using a centrifugal granulator (BZL-300, China). The spheres contained interparticle macropores that were generated between the MOF crystals in the shaped bodies.…”

Section: Granulationmentioning

confidence: 99%

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Granulation and Shaping of Metal-Organic Frameworks

Lee

Valekar

Hwang

et al. 2016

The Chemistry of Metal-Organic Frameworks: Synthesis, Characterization, and Applications

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IntroductionShaping and forming of metal-organic frameworks (MOFs) are essential for practical applications like adsorption/separation and catalysis, which require structuring of the nano-/microcrystalline fine powders of MOFs into a macroscopic body [1][2][3][4][5][6][7]. When a process for catalysis or adsorptive separation is scaled up to the pilot or commercial scale, the form in which an active catalyst or adsorbent is used is decisive in determining the ultimate performance of the unit [8][9][10]. In this respect, the size and shape of the target material require a compromise between minimizing pore diffusion effects in the material particles, for which small particles are necessary, and minimizing the pressure drop across the reactor, which requires large particle sizes [11]. The shaped MOFs should maintain excellent performance shown by the original powder forms based on their high porosity, crystallinity, and flexibility [12]. Therefore, the proper selection of the shaping or forming process is important in the MOF research field for chemical engineering and industrial applications. As the shaping methods are often proprietary and often more of an art than a science, the exact procedures are rarely disclosed.The shaped MOFs can also be prepared using techniques (Figure 18.1) that have typically been utilized for synthesizing catalysts and adsorbents from porous materials, such as pressing, extrusion, granulation and spray drying, foaming, casting, and coating. Well-shaped bodies have been produced in the forms of pellets, tablets, monoliths, granules, and spheres [13][14][15][16]. However, to utilize shaped MOFs successfully for industrial applications, they should have sufficient mechanical strength, chemical stability, attrition resistance, maximal bulk density, and minimal wasted space in the storage vessel [17][18][19][20][21][22][23][24]. As the performance of shaped MOFs for industrial or large-scale applications depends on several parameters, including the mass-and heat-transfer properties, gas diffusion kinetics, pressure drop across material, mechanical strength, and volumetric efficiency, achieving high mechanical integrity of the structured MOF is critical to the performance in real engineering processes. The Chemistry of Metal-Organic Frameworks: Synthesis, Characterization, and Applications, First Edition. Edited by Stefan Kaskel.

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“…26 Ren et al showed that adding sucrose as a binder with UiO-66 and forming pellets resulted in more than a 50% reduction in surface area and a large decrease in the hydrogen storage capacity over the MOF in powder form. 30 Denny et al recently reported composites using a hydrophobic polymer (PVDF) and several MOFs that were formed into MOF mixed-matrix membranes; each membrane displayed drastically lower surface area than the powdered MOF materials likely due to significant pore blockage by the polymer. 29 DeCoste et al focused on one of these membranes, PVDF and CuBTC, for ammonia adsorption studies and observed with increasing polymer wt % ammonia capacity was lowered accordingly.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks

Mounfield

Claure

Agrawal

et al. 2016

Ind. Eng. Chem. Res.

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A hydrotalcite-derived MgAl oxide (MMO) was evaluated in combination with the metal-organic frameworks (MOFs) UiO-66 and UiO-66-NH 2 for the adsorption of ammonia. Analysis of the materials' textural properties after ammonia breakthrough adsorption revealed no change in the PXRD patterns or FTIR spectra; however, a slight decrease in surface area was observed, consistent with the hypothesized presence of strongly adsorbed species after adsorption. UiO-66:MMO and UiO-66-NH 2 :MMO composites maintained ammonia adsorption capacity under dry conditions. An almost two-fold increase in humid ammonia capacity was observed for the UiO-66:MMO composite, far beyond that expected through a linear combination of the two materials' capacities. The synergistic effect observed in humid conditions was further investigated with water adsorption experiments, which suggested the effect is the result of the high water affinity of MMO.

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

Cited by 142 publications

References 20 publications

Synthesis of Bamboo-Based Activated Carbons with Super-High Specific Surface Area for Hydrogen Storage

Synthesis of Bamboo-Based Activated Carbons with Super-High Specific Surface Area for Hydrogen Storage

Granulation and Shaping of Metal-Organic Frameworks

Synergistic Effect of Mixed Oxide on the Adsorption of Ammonia with Metal–Organic Frameworks

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