A Two-Column Method for the Separation of Kr and Xe from Process Off-Gases

Liu, Jian; Fernández, Carlos A.; Martin, Paul F.; Thallapally, Praveen K.; Strachan, Denis M.

doi:10.1021/ie502156h

Cited by 77 publications

(65 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A two‐column adsorption module was proposed for UNF off‐gas treatment . Specifically, the first bed is filled with Ni‐DOBDC, which has high Xe adsorption capacity.…”

Section: Gas Phase Separationmentioning

confidence: 99%

Metal–Organic Frameworks for Separation

et al. 2018

View full text Add to dashboard Cite

Separation is an important industrial step with critical roles in the chemical, petrochemical, pharmaceutical, and nuclear industries, as well as in many other fields. Although much progress has been made, the development of better separation technologies, especially through the discovery of high-performance separation materials, continues to attract increasing interest due to concerns over factors such as efficiency, health and environmental impacts, and the cost of existing methods. Metal-organic frameworks (MOFs), a rapidly expanding family of crystalline porous materials, have shown great promise to address various separation challenges due to their well-defined pore size and unprecedented tunability in both composition and pore geometry. In the past decade, extensive research is performed on applications of MOF materials, including separation and capture of many gases and vapors, and liquid-phase separation involving both liquid mixtures and solutions. MOFs also bring new opportunities in enantioselective separation and are amenable to morphological control such as fabrication of membranes for enhanced separation outcomes. Here, some of the latest progress in the applications of MOFs for several key separation issues, with emphasis on newly synthesized MOF materials and the impact of their compositional and structural features on separation properties, are reviewed and highlighted.

show abstract

“…A two‐column adsorption module was proposed for UNF off‐gas treatment . Specifically, the first bed is filled with Ni‐DOBDC, which has high Xe adsorption capacity.…”

Section: Gas Phase Separationmentioning

confidence: 99%

Metal–Organic Frameworks for Separation

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In the category of traditional porous materials, zeolites and activated carbon have been tested for noble‐gas capture; however, they suffer from relatively low selectivity, lack of modularity, and fire hazards . More advanced and highly tunable classes of nanoporous materials, metal–organic frameworks (MOFs), porous coordination polymers, and porous molecular crystals, have now emerged with promising potential for Xe/Kr separations . In particular, porous organic cage‐like material CC3 exhibits a cage commensurate with the size of Xe and demonstrated a selectivity of 20 for Xe over Kr from a simulated UNF reprocessing facility off‐gas stream …”

Section: Figurementioning

confidence: 99%

“…Physisorption‐based separation at room temperature utilizing a porous material is a potentially cost‐effective alternative to the conventional cryogenic distillation process . Because Xe will outcompete Kr for adsorption sites (as Xe has a larger electron cloud and consequently a deeper potential well), we seek a material that is selective for Xe over Kr to first remove the Xe from the UNF reprocessing off‐gas; Kr can then be removed from the Xe‐free effluent in a second step . In the category of traditional porous materials, zeolites and activated carbon have been tested for noble‐gas capture; however, they suffer from relatively low selectivity, lack of modularity, and fire hazards .…”

Section: Figurementioning

confidence: 99%

Noria: A Highly Xe‐Selective Nanoporous Organic Solid

Patil

Banerjee

Simon

et al. 2016

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

Separation of xenon and krypton is of industrial and environmental concern; the existing technologies use cryogenic distillation. Thus, a cost-effective, alternative technology for the separation of Xe and Kr and their capture from air is of significant importance. Herein, we report the selective Xe uptake in a crystalline porous organic oligomeric molecule, noria, and its structural analogue, PgC-noria, under ambient conditions. The selectivity of noria towards Xe arises from its tailored pore size and small cavities, which allows a directed non-bonding interaction of Xe atoms with a large number of carbon atoms of the noria molecular wheel in a confined space.

show abstract

“…250 Using two adsorption processes in series, one to remove xenon, and the next to remove krypton, is one strategy, where a material with a high Xe/Kr selectivity is desired for the first process. 251 The radioactive krypton ( 85 Kr, half-life ca. 10.7 years) recovered from the second process can be sequestered, while the xenon, which has a much shorter half-life (longest-lived 127 Xe, half-life 36.4 days 251 ), recovered from the first process could be sold in the market for use in medicine, ion propulsion, lighting, and insulation.…”

Section: Xenon/krypton Separationsmentioning

confidence: 99%

The Role of Molecular Modeling & Simulation in the Discovery and Deployment of Metal-Organic Frameworks for Gas Storage and Separation

Sturluson¹,

Huynh²,

Kaija³

et al. 2019

Preprint

View full text Add to dashboard Cite

Metal-organic frameworks (MOFs) are highly tunable, extended-network, crystalline, nanoporous materials with applications in gas storage, separations, and sensing. We review how molecular models and simulations of gas adsorption in MOFs have informed the discovery of performant MOFs for methane, hydrogen, and oxygen storage, xenon, carbon dioxide, and chemical warfare agent capture, and xylene enrichment. Particularly, we highlight how large, open databases of MOF crystal structures, post-processed to enable molecular simulations, are a platform for computational materials discovery. We discuss how to orient research efforts to routinize the computational discovery of MOFs for adsorption-based engineering applications.

show abstract

A Two-Column Method for the Separation of Kr and Xe from Process Off-Gases

Cited by 77 publications

References 32 publications

Metal–Organic Frameworks for Separation

Metal–Organic Frameworks for Separation

Noria: A Highly Xe‐Selective Nanoporous Organic Solid

The Role of Molecular Modeling & Simulation in the Discovery and Deployment of Metal-Organic Frameworks for Gas Storage and Separation

Contact Info

Product

Resources

About