A short review on recent advances in porous adsorbents for separation of oxygen from atmospheric air

Shrotri, Aadesh R.; Niphadkar, Prashant S.; Bokade, Vijay V.; Utgikar, Vivek; Nandanwar, Sachin U.

doi:10.1002/apj.2896

Cited by 8 publications

(2 citation statements)

References 72 publications

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“…It is clear from the literature that the Ag-ETS-10 sorption affinity is increased in the order O 2 < Ar < N 2 . Recently, our group has reported the summary of potential adsorbents for O 2 purification from air and identified that Ag-ETS-10 is one of the potential sorbents for O 2 purification, which can remove Ar from air composition …”

Section: Introductionmentioning

confidence: 99%

“…Recently, our group has reported the summary of potential adsorbents for O 2 purification from air and identified that Ag-ETS-10 is one of the potential sorbents for O 2 purification, which can remove Ar from air composition. 28 Many researchers are still focusing on improving the adsorption capacity of N 2 and Ar for O 2 separation. Recently, Mousavi et al 29 reported on Ca 2+ ion-exchanged hierarchical 13X for N 2 sorption.…”

Section: Introductionmentioning

confidence: 99%

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Equilibrium Adsorption of Nitrogen, Oxygen, and Argon on Silver-Exchanged Hierarchical ETS-10

et al. 2023

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Silver-exchanged hierarchical ETS-10 (Ag-H-ETS-10) was synthesized using Ag + exchange with hierarchical Engelhard titanosilicate (H-ETS-10) using silver nitrate solution. The physical properties of the adsorbent were analyzed using X-ray diffraction (XRD), BET surface area, nitrogen adsorption−desorption, pore volume, energy dispersive spectroscopy (EDS), and high resolution-transmission electron microscopy (HR-TEM). N 2 physisorption data confirmed that a micro-mesoporous (bimodal) structure was created in the Ag-H-ETS-10. The equilibrium adsorbent data of pure gases N 2 , O 2 , and Ar were investigated in the temperature range from 288 to 318 K up to 10 bar. The equilibrium adsorption capacity of Ag-H-ETS-10 was found to be 1.12 mmol g −1 for N 2 , 0.87 mmol g −1 for O 2 , and 1.09 mmol g −1 for Ar at 298 K and ∼10 bar. ∼20% higher adsorption capacity was found for N 2 and Ar in Ag-H-ETS-10 compared to Ag-ETS-10. The higher sorption capacity was attributed to the formation of a bimodal structure and π-complexation interaction by the Ag cation, which allows a multilayer of N 2 and Ar molecules. The Sips isotherm model was well fitted for the Ag-H-ETS-10 experimental data among Langmuir, Freundlich, Toth, and Temkin models. The measured equilibrium adsorption data for Ag-H-ETS-10 can be useful for the O 2 purification process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Equilibrium Adsorption of Nitrogen, Oxygen, and Argon on Silver-Exchanged Hierarchical ETS-10

et al. 2023

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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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Synthesis of LSX Using Seed-iteration Approach with High N2 Adsorption Capacity for Air Separation

Huang,

Wang,

Liu

et al. 2024

Chem. Res. Chin. Univ.

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A short review on recent advances in porous adsorbents for separation of oxygen from atmospheric air

Cited by 8 publications

References 72 publications

Equilibrium Adsorption of Nitrogen, Oxygen, and Argon on Silver-Exchanged Hierarchical ETS-10

Equilibrium Adsorption of Nitrogen, Oxygen, and Argon on Silver-Exchanged Hierarchical ETS-10

The Reinforced Separation of Intractable Gas Mixtures by Using Porous Adsorbents

Synthesis of LSX Using Seed-iteration Approach with High N2 Adsorption Capacity for Air Separation

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