Methane/nitrogen separation by SMB using $${\text{UiO - 66(Zr)}}\_{\text{(COOH)}}_{{2}}$$

Dias, Rafael O. M.; Ferreira, Alexandre F. P.; Cho, Kyung Ho; Lee, U.-Hwang; Chang, Jon-San; Rodrigues, Alírio E.; Ribeiro, Ana M.

doi:10.1007/s43153-021-00202-6

Cited by 4 publications

(6 citation statements)

References 39 publications

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“…When considering the recovery of argon from the raffinate mixture by PSA, a different adsorbent must be used, such as the 5 Å molecular sieve, which is used for air separation . Other possible adsorbents include the zeolites 13X and LiX. , As an alternative to argon, helium could be utilized as desorbent, although its use may not be economically viable for industrial purposes . As such, the use of CO 2 for the separation of CH 4 /N 2 streams by gas-phase SMB might be preferable since the downstream separations needed are much easier to be achieved, and the desorbent gas is also cheaper.…”

Section: Resultsmentioning

confidence: 99%

“…15,43 As an alternative to argon, helium could be utilized as desorbent, although its use may not be economically viable for industrial purposes. 23 As such, the use of CO 2 for the separation of CH 4 /N 2 streams by gas-phase SMB might be preferable since the downstream separations needed are much easier to be achieved, and the desorbent gas is also cheaper. Also, according to Storti et al, when the desired component is recovered in the extract stream, a strong eluent is more appropriate from an operation standpoint since the system is less sensitive to disturbances in the section flow rates.…”

Section: Isosteric Heat Of Adsorptionmentioning

confidence: 99%

“…30 Also, in our previous work, the performance of a zirconium MOF, UiO-66(Zr)_(COOH) 2 , was evaluated for this separation, and an in silico SMB cycle using a weakly adsorbed desorbent gas was presented. 23 To our knowledge, experimental work to provide proof of concept in a conventional gas-phase SMB unit has not yet been done for the herein studied separation.…”

Section: Introductionmentioning

confidence: 99%

“…This technology has been used for demanding gas separation applications, which is the case of the separation of olefin/paraffin mixtures, − showing its viability as an alternative to cryogenic distillation. Regarding the CH 4 /N 2 separation by adsorptive processes, the research is mainly focused on the performance of materials, such as zeolites, − carbon-based materials, ,− and metal–organic frameworks (MOFs) − for use in cyclic adsorption processes, such as pressure swing adsorption (PSA). Recently, a vacuum PSA process was improved by introducing a displacement step to regenerate the adsorbent, in an SMB operation mode, producing high-purity product streams .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a vacuum PSA process was improved by introducing a displacement step to regenerate the adsorbent, in an SMB operation mode, producing high-purity product streams . Also, in our previous work, the performance of a zirconium MOF, UiO-66(Zr)_(COOH) 2 , was evaluated for this separation, and an in silico SMB cycle using a weakly adsorbed desorbent gas was presented . To our knowledge, experimental work to provide proof of concept in a conventional gas-phase SMB unit has not yet been done for the herein studied separation.…”

Section: Introductionmentioning

confidence: 99%

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Gas-Phase Simulated Moving Bed for Methane/Nitrogen Separation Using a Commercial Activated Carbon

Dias

Ferreira

Rodrigues

et al. 2022

Ind. Eng. Chem. Res.

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This work focuses on designing and developing a simulated moving bed (SMB) process for the separation of methane and nitrogen mixtures, using a commercial activated carbon (BPL) as the adsorbent material and two potential desorbent gases: argon and carbon dioxide. As such, the material performance was evaluated by measuring the adsorption equilibrium data and the dynamic behavior of single and multicomponent adsorption through fixed-bed experiments. The pure component isotherms of N2, CH4, Ar, and CO2 were measured at 303, 323, and 343 K in a pressure range of 0–2.5 bar using a volumetric apparatus, with CO2 exhibiting the highest affinity to the stationary phase and Ar the lowest. The data was regressed against the dual-site Langmuir (DSL) model. Single, binary, and ternary breakthrough curves were also assessed, allowing the validation of the proposed mathematical model. Two SMB cycles were employed to separate an equimolar CH4/N2 mixture using each desorbent gas to evaluate the impact of the desorbent strength in the process. The respective separation regions were drawn. Both cycles were capable of producing a high-purity methane stream (96.2 and 97.4% for the Ar and CO2 experiment, respectively) with high recovery (>92%). When argon is used as the desorbent gas, the extract product stream is obtained with productivity of 14.1 kg·m–3 ads·h–1.

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Section: Resultsmentioning

confidence: 99%

Section: Isosteric Heat Of Adsorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Gas-Phase Simulated Moving Bed for Methane/Nitrogen Separation Using a Commercial Activated Carbon

Dias

Ferreira

Rodrigues

et al. 2022

Ind. Eng. Chem. Res.

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A performance indicator for the screening of adsorbent/desorbent pairs for gas‐phase simulated moving bed applications

et al. 2023

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In a simulated moving bed, the regeneration is accomplished by the introduction of a third species, the desorbent, which is later recovered by two downstream separations. As such, the choice of a proper adsorbent/desorbent pair is critical to ensure the effectiveness of the SMB process. While this can be done by comparing the separation region for each system, the computational effort required is extremely high. By developing a parameter that uses readily available literature data, the selection process is sped up and can be easily accomplished. In this work, an SMB performance indicator (SPI) is suggested. This indicator involves the trade-off between the adsorption selectivity in the presence of the desorbent, the adsorption capacity of the most retained species, and the ratio of the most and less retained species' enthalpies. The developed metric can select the most suitable adsorbent/pair for a specific gas separation by SMB through simple calculations.

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Enhancing CH4 separation from surplus N2 in Al-based metal organic frameworks through liner ligand regulation

Yu,

Li,

Min

et al. 2024

Fuel

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Methane/nitrogen separation by SMB using $${\text{UiO - 66(Zr)}}\_{\text{(COOH)}}_{{2}}$$

Cited by 4 publications

References 39 publications

Gas-Phase Simulated Moving Bed for Methane/Nitrogen Separation Using a Commercial Activated Carbon

Gas-Phase Simulated Moving Bed for Methane/Nitrogen Separation Using a Commercial Activated Carbon

A performance indicator for the screening of adsorbent/desorbent pairs for gas‐phase simulated moving bed applications

Enhancing CH4 separation from surplus N2 in Al-based metal organic frameworks through liner ligand regulation

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