Enhanced noble gas adsorption in Ag@MOF-74Ni

Liu, Jian; Strachan, Denis M.; Thallapally, Praveen K.

doi:10.1039/c3cc47777k

Cited by 158 publications

(139 citation statements)

References 41 publications

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“…8 As expected from the nature of isotherms, a greater Q st for Xe (29 kJ/mol) than for Kr (22 kJ/mol) was calculated for Co 3 (HCOO) 6 , and similar Q st trends were also observed for the other isostructural metal analogues ( Figure 5). The follow-up breakthrough experiments backed up the Xe selectivity (∼6) for the M 3 (HCOO) 6 series. 8 Simulations showed that each Xe atom optimally fits within a segment (i.e., a zig or a zag) and thus can interact more effectively with the π cloud of the formate groups on the pore surface.…”

Section: (Hcoo)supporting

confidence: 78%

“…8,11 The adsorption of Xe in nanoporous Co 3 (HCOO) 6 shows a type I adsorption isotherm (26 wt % at 25°C and 100 kPa), while the adsorption isotherm for Kr was found to be linear. 8 As expected from the nature of isotherms, a greater Q st for Xe (29 kJ/mol) than for Kr (22 kJ/mol) was calculated for Co 3 (HCOO) 6 , and similar Q st trends were also observed for the other isostructural metal analogues ( Figure 5). The follow-up breakthrough experiments backed up the Xe selectivity (∼6) for the M 3 (HCOO) 6 series.…”

Section: (Hcoo)mentioning

confidence: 99%

“…IRMOF-1 (IRMOF = isoreticular MOF) is a highly porous MOF (surface area = 3100−3800 m 2 /g) with tetranuclear Zn 4 O(O 2 C) 6 -based SBUs bridged by terephthalate linkers to form a cubic 3-periodic network with squarelike channels with dimensions of ∼1.5 nm. 25 Mueller and co-workers performed the first experimental pressure-swing adsorption (PSA) study to investigate the adsorption performance for storage of Xe and Kr at room temperature.…”

Section: Irmof-1 (Mof-5)mentioning

confidence: 99%

“…9 Eventually, we were able to enhance the uptake capacity and selectivity of Ni-DOBDC with a nanoparticle loading approach. 6 The silver-nanoparticle-loaded Ni-DOBDC (Ag@Ni-DOBDC) had better Xe uptake capacity (70 wt %) and selectivity (Xe/Kr ≈ 7) than the parent framework because of the strong dipole−induced dipole interaction between adsorbed Xe atoms and uniformly dispersed silver clusters within the pores. The high Xe adsorption capacity of Ni-DOBDC and the reverse selectivity of FMOFCu were combined in a two-bed breakthrough measurement in which Xe was removed from the mixture stream first using a Ni-DOBDC bed.…”

Section: M-dobdc (M-mof-74)mentioning

confidence: 99%

“…Among a diverse range of metal formates, M 3 (HCOO) 6 (M = Mg, Ni, Co, Zn, Mn) is particularly noteworthy because of its simplistic diamondoid topology and the existence of a zigzag channel with an effective pore size of 0.5 to 0.6 nm. 8,11 The adsorption of Xe in nanoporous Co 3 (HCOO) 6 shows a type I adsorption isotherm (26 wt % at 25°C and 100 kPa), while the adsorption isotherm for Kr was found to be linear.…”

Section: (Hcoo)mentioning

confidence: 99%

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Potential of Metal–Organic Frameworks for Separation of Xenon and Krypton

et al. 2014

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* S Supporting Information CONSPECTUS: The total world energy demand is predicted to rise significantly over the next few decades, primarily driven by the continuous growth of the developing world. With rapid depletion of nonrenewable traditional fossil fuels, which currently account for almost 86% of the worldwide energy output, the search for viable alternative energy resources is becoming more important from a national security and economic development standpoint. Nuclear energy, an emission-free, high-energy-density source produced by means of controlled nuclear fission, is often considered as a clean, affordable alternative to fossil fuel. However, the successful installation of an efficient and economically viable industrial-scale process to properly sequester and mitigate the nuclear-fission-related, highly radioactive waste (e.g., used nuclear fuel (UNF)) is a prerequisite for any further development of nuclear energy in the near future. Reprocessing of UNF is often considered to be a logical way to minimize the volume of high-level radioactive waste, though the generation of volatile radionuclides during reprocessing raises a significant engineering challenge for its successful implementation. The volatile radionuclides include but are not limited to noble gases (predominately isotopes of Xe and Kr) and must be captured during the process to avoid being released into the environment. Currently, energy-intensive cryogenic distillation is the primary means to capture and separate radioactive noble gas isotopes during UNF reprocessing. A similar cryogenic process is implemented during commercial production of noble gases though removal from air. In light of their high commercial values, particularly in lighting and medical industries, and associated high production costs, alternate approaches for Xe/Kr capture and storage are of contemporary research interest. The proposed pathways for Xe/Kr removal and capture can essentially be divided in two categories: selective absorption by dissolution in solvents and physisorption on porous materials. Physisorption-based separation and adsorption on highly functional porous materials are promising alternatives to the energy-intensive cryogenic distillation process, where the adsorbents are characterized by high surface areas and thus high removal capacities and often can be chemically fine-tuned to enhance the adsorbate−adsorbent interactions for optimum selectivity. Several traditional porous adsorbents such as zeolites and activated carbon have been tested for noble gas capture but have shown low capacity, selectivity, and lack of modularity. Metal− organic frameworks (MOFs) or porous coordination polymers (PCPs) are an emerging class of solid-state adsorbents that can be tailor-made for applications ranging from gas adsorption and separation to catalysis and sensing. Herein we give a concise summary of the background and development of Xe/Kr separation technologies with a focus on UNF reprocessing and the prospects of MOF-based adsorbents for that particular appl...

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Section: (Hcoo)supporting

confidence: 78%

Section: (Hcoo)mentioning

confidence: 99%

Section: Irmof-1 (Mof-5)mentioning

confidence: 99%

Section: M-dobdc (M-mof-74)mentioning

confidence: 99%

Section: (Hcoo)mentioning

confidence: 99%

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Potential of Metal–Organic Frameworks for Separation of Xenon and Krypton

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Composites of Metal–Organic Frameworks (MOFs): Synthesis and Applications in Separation and Catalysis

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et al. 2018

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The Reinforced Separation of Intractable Gas Mixtures by Using Porous Adsorbents

Ke,

Xiong,

Fang

et al. 2024

Advanced Materials

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This review focuses on the mechanism and driving force in the intractable gas separation using porous adsorbents. A variety of intractable mixtures have been discussed, including air separation, carbon capture, and hydrocarbon purification. Moreover, the separation systems are categorized according to distinctly biased modes depending on the minor differences in the kinetic diameter, dipole/quadruple moment, and polarizability of the adsorbates, or sorted by the varied separation occasions (e.g., CO2 capture from flue gas or air) and driving forces (thermodynamic and kinetic separation, molecular sieving). Each section highlights the functionalization strategies for porous materials, like synthesis condition optimization and organic group modifications for porous carbon materials, cation exchange and heteroatom doping for zeolites, and metal node‐organic ligand adjustments for MOFs. These functionalization strategies are subsequently associated with enhanced adsorption performances (capacity, selectivity, structural/thermal stability, moisture resistance, etc.) toward the analog gas mixtures. Finally, this review also discusses future challenges and prospects for using porous materials in intractable gas separation. Therein, the combination of theoretical calculation with the synthesis condition and adsorption parameters optimization of porous adsorbents may have great potential, given its fast targeting of candidate adsorbents and deeper insights into the adsorption forces in the confined pores and cages.

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Enhanced noble gas adsorption in Ag@MOF-74Ni

Cited by 158 publications

References 41 publications

Potential of Metal–Organic Frameworks for Separation of Xenon and Krypton

Potential of Metal–Organic Frameworks for Separation of Xenon and Krypton

Composites of Metal–Organic Frameworks (MOFs): Synthesis and Applications in Separation and Catalysis

The Reinforced Separation of Intractable Gas Mixtures by Using Porous Adsorbents

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