Methane separation from diluted mixtures by fixed bed adsorption using MOFs: Model validation and parametric studies

Ursueguía, David; Dı́az, Eva; Vega, Aurelio; Ordóñez, Salvador

doi:10.1016/j.seppur.2020.117374

Cited by 12 publications

(4 citation statements)

References 54 publications

(65 reference statements)

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“…Figure shows the final adsorption configuration of CH 4 on the surfaces of different minerals with FW at 80 °C. It can be seen that methane molecules show weak adsorption on smectite, illite, and total shale at low pressure, while organic matter adsorbed a large number of methane molecules at a lower pressure due to its special physical and chemical properties and spatial structure, which is consistent with the experimental results. While at high pressure, the surface adsorbed methane gradually saturated and the density of free gas increases significantly .…”

Section: Resultssupporting

confidence: 87%

Impacts and Mechanisms of Water on CH₄ Adsorption on Shale Minerals

Wang

Zhou

et al. 2023

Energy Fuels

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Formation water (FW) and fracturing fluid (FF) significantly affect the adsorption rules of CH4 on a shale surface. To clarify the impact rules and micromechanisms of FW and FF on CH4 adsorption, isothermal adsorption experiments of CH4 on different shale minerals with different equilibrium water were conducted. Then, the corresponding adsorption models were constructed by Grand Canonical Monte Carlo (GCMC) simulation to perform adsorption simulation after matching experiments. Finally, molecular dynamic (MD) simulation was carried out to study the micromechanisms of FW and FF affecting CH4 adsorption on different shale minerals. The results show that the adsorption capacity of organic matter to CH4 is much stronger than that of other minerals. Compared to dry conditions, the adsorption capacity of organic matter, smectite, illite, and total shale with FW (S w ≈ 15%) decreases to 65, 45, 70, and 55%, respectively. The impact of FF on CH4 adsorption capacity is more significant than FW. The adsorption capacity decreases to 45, 30, 50, and 45% for organic matter, smectite, illite, and total shale with FF (S w ≈ 15%), respectively. FW molecules inhibit CH4 adsorption by occupying adsorption sites on mineral surfaces. However, the HPAM in FF completely covers the mineral surface to compress adsorption space and hinder CH4 adsorption. Although water molecules in both FW and FF occupy part of the adsorption sites on organic matter, the left sites can still absorb large amounts of CH4. It provides theoretical guidance for the efficient development of shale gas.

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Section: Resultssupporting

confidence: 87%

Impacts and Mechanisms of Water on CH₄ Adsorption on Shale Minerals

Wang

Zhou

et al. 2023

Energy Fuels

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“…Henry's constant is a physical property that is demonstrative of gas solubility in the liquid phase, and it provides information about the equilibrium state of the gas-liquid system [67][68][69]. As can be seen in Figure 7 It is worth noting that while the adsorption of CH 4 using solid adsorbents like zeolite, MOFs, and activated carbon has shown promising results [70][71][72][73], employing these adsorbents in a continuous adsorption/desorption process for separating CH 4 from VAM streams (1 vol% CH 4 ) has yet to be investigated.…”

Section: Model Validationmentioning

confidence: 99%

Point Source Capture of Methane Using Ionic Liquids in Packed Bed Absorbers/Strippers: Experimental and Modelling

Rahimpour,

Zanganeh,

Moghtaderi

2024

Processes

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Fugitive methane emissions from the mining industry, particularly so-called ventilation air methane (VAM) emissions, are considered among the largest sources of greenhouse gas (GHG) emissions. VAM emissions not only contribute to the global warming but also pose a significant hazard to mining safety due to the risk of accidental fires and explosions. This research presents a novel approach that investigates the capture of CH4 in a controlled environment using 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide [BMIM][TF2N] ionic liquid (IL), which is an environmentally friendly solvent. The experimental and modelling results confirm that CH4 absorption in [BMIM][TF2N], in a packed column, can be a promising technique for capturing CH4 from point sources, particularly the outlet streams of ventilation shafts in underground coal mines, which typically accounts for <1% v/v of the flow. This study assessed the effectiveness of CH4 removal in a packed bed column by testing various factors such as absorption temperature, liquid and gas flow rates, flow pattern, packing size, desorption temperature, and desorption pressure. According to the optimisation results, the following parameters can be used to achieve a CH4 removal efficiency of 23.8%: a gas flow rate of 0.1 L/min, a liquid flow rate of 0.5 L/min, a packing diameter of 6 mm, and absorption and desorption temperatures of 303 K and 403.15 K, respectively. Additionally, the experimental results indicated that ILs could concentrate CH4 in the simulated VAM stream by approximately 4 fold. It is important to note that the efficiency of CH4 removal was determined to be 3.5-fold higher compared to that of N2. Consequently, even though the VAM stream primarily contains N2, the IL used in the same stream shows a notably superior capacity for removing CH4 compared to N2. Furthermore, CH4 absorption with [BMIM][TF2N] is based on physical interactions, leading to reduced energy requirements for regeneration. These findings validate the method’s effectiveness in mitigating CH4 emissions within the mining sector and enabling the concentration of VAM through a secure and energy-efficient procedure.

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“…Three different organometallics (MOFs), i.e., basaltic C300, A100, and F300, were used with adsorbent beds operated at 298 K, 0.1 MPa, and an inlet methane concentration of 2%. The methane adsorption capacity values were 0.078, 0.028, and 0.040 mmol/g . To optimize MOF growth while maintaining structural and mechanical properties, 3D printing technology can be used to impregnate with the UTSA-16 metal precursor (Co) and promote internal growth using solvothermal synthesis.…”

Section: Applications Of Monolithic Mofsmentioning

confidence: 99%

“…The methane adsorption capacity values were 0.078, 0.028, and 0.040 mmol/g. 121 To optimize MOF growth while maintaining structural and mechanical properties, 3D printing technology can be used to impregnate with the UTSA-16 metal precursor (Co) and promote internal growth using solvothermal synthesis. The equilibrium and dynamic adsorption tests indicated that the 3D-printed MOF monolithic material possessed good separation potential for each gas mixture, which provides a novel route for USTA-16 loaded monomers (Figure 15).…”

Section: Adsorption and Separationmentioning

confidence: 99%

Review and Perspectives of Monolithic Metal–Organic Frameworks: Toward Industrial Applications

Liu

et al. 2023

Energy Fuels

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Metal−organic frameworks (MOFs) have attracted considerable attention owing to their large surface area and high structural tunability, which lead to a wide range of applications. Owing to excellent properties of MOFs in various applications, the synthesis process of MOFs has been gradually developed with high yields and stable shapes to fulfill industrial requirements. However, the industrial usage of traditional powder-formed MOFs is limited because powder may lead to safety issues and disperse easily. Therefore, MOFs with different shapes and standard properties are required for applications. This review has summarized currently reported methods for shaping MOFs, e.g., binder-based, high-pressure, surfactant-assisted, supercritical CO 2 (scCO 2 ), and sol−gel processes. The industrial applications based on shaped MOFs are summarized to support future studies on the formation of MOFs with stable shapes.

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Methane separation from diluted mixtures by fixed bed adsorption using MOFs: Model validation and parametric studies

Cited by 12 publications

References 54 publications

Impacts and Mechanisms of Water on CH₄ Adsorption on Shale Minerals

Impacts and Mechanisms of Water on CH₄ Adsorption on Shale Minerals

Point Source Capture of Methane Using Ionic Liquids in Packed Bed Absorbers/Strippers: Experimental and Modelling

Review and Perspectives of Monolithic Metal–Organic Frameworks: Toward Industrial Applications

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Methane separation from diluted mixtures by fixed bed adsorption using MOFs: Model validation and parametric studies

Cited by 12 publications

References 54 publications

Impacts and Mechanisms of Water on CH4 Adsorption on Shale Minerals

Impacts and Mechanisms of Water on CH4 Adsorption on Shale Minerals

Point Source Capture of Methane Using Ionic Liquids in Packed Bed Absorbers/Strippers: Experimental and Modelling

Review and Perspectives of Monolithic Metal–Organic Frameworks: Toward Industrial Applications

Contact Info

Product

Resources

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Impacts and Mechanisms of Water on CH₄ Adsorption on Shale Minerals

Impacts and Mechanisms of Water on CH₄ Adsorption on Shale Minerals