Molecular sieve supported ionic liquids as efficient adsorbent for CO2 capture

Chen, Hou; Wang, Rui

doi:10.2298/jsc220214103y

Cited by 13 publications

(7 citation statements)

References 4 publications

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“…This behavior is associated with ILs high viscosity difficulting mass transfer. When ILs are immobilized in a solid support an increase of gas-liquid contact area is reached, improving kinetic to supported materials as previously reported (Aboudi and Vafaeezadeh, 2015; Moya et al., 2016; Safiah et al., 2014; Yang and Wang, 2015). The same behavior was evidenced for 1-Butyl-methylimidazolium acetate encapsulated in a solid material.…”

Section: Resultssupporting

confidence: 67%

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Polesso

Bernard

Ferrari

et al. 2019

Heliyon

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Physical immobilization of ionic liquids (ILs) in solid materials appears as an interesting strategy for the development of new sorbents for CO 2 separation from natural gas. In this work the effect of physical immobilization of two ionic liquids with different anions (bmim[Cl] and bmim[OAc]) on two mesoporous supports (commercial silica SBA-15 and silica extracted from rice husk) was evaluated for CO 2 separation from natural gas by experimental determination of CO 2 sorption, CO 2 /CH 4 selectivity and sorption kinetics. Results showed that the pure supports present the greatest CO 2 sorption capacity when compared to immobilized ILs. However, CO 2 removal efficiency improves considerably in the CO 2 /CH 4 mixture when ILs are immobilized in these supports. The best selectivity results were obtained for supports immobilized with the IL bmim[Cl] and values increased for SIL-Cl by 37% and SBA-Cl 51% when compared with their respective supports. The contribution of SIL-Cl (3.03 ± 0.12) to separation performance (CO 2 /CH 4 ) is similar to SBA-Cl (3.29 ± 0.39). ILs supported also presented fast sorption kinetics when compared to pure ILs thus being an interesting alternative in the search for highly efficient and low-cost separation processes.

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Section: Resultssupporting

confidence: 67%

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Polesso

Bernard

Ferrari

et al. 2019

Heliyon

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“…48,49 As a result, the temperature rise caused the positive sorption reaction to convert to the reverse desorption reaction. 50,51 The desorption process of CO 2 was investigated at 303, 313, 323, and 333 K under a N 2 atmosphere. The results are presented in Figure 8b, which clearly shows that the CO 2 desorption becomes increasingly complete with increasing temperature.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Enhanced CO₂ Capture through SAPO-34 Impregnated with Ionic Liquid

Ye,

Shen,

Chen

et al. 2024

Langmuir

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The concurrent utilization of an adsorbent and absorbent for carbon dioxide (CO 2 ) adsorption with synergistic effects presents a promising technique for CO 2 capture. Here, 1-butyl-3-methylimidazole acetate ([Bmim][Ac]), with a high affinity for CO 2 , and the molecular sieve SAPO-34 were selected. The impregnation method was used to composite the hybrid samples of [Bmim][Ac]/ SAPO-34, and the pore structure and surface property of prepared samples were characterized. The quantity and kinetics of the sorbed CO 2 for loaded samples were measured using thermogravimetric analysis. The study revealed that SAPO-34 could retain its pristine structure after [Bmim][Ac] loading. The CO 2 uptake of the loaded sample was 1.879 mmol g −1 at 303 K and 1 bar, exhibiting a 20.6% rise compared to that of the pristine SAPO-34 recording 1.558 mmol g −1 . The CO 2 uptake kinetics of the loaded samples were also accelerated, and the apparent mass transfer resistance for CO 2 sorption was significantly reduced by 11.2% compared with that of the pure [Bmim][Ac]. The differential scanning calorimetry method revealed that the loaded sample had a lower CO 2 desorption heat than that of the pure [Bmim][Ac], and the CO 2 desorption heat of the loaded samples was between 30.6 and 40.8 kJ mol −1 . The samples exhibited good cyclic stability. This material displays great potential for CO 2 capture applications, facilitating the reduction of greenhouse gas emissions.

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“…The characteristic peak of the imidazole ring of the ILs appears at 1168 cm −1 and the C-N group peak is observed at 1334 cm −1 , which indicates that the IL loading on the magnesite materials is successful. The peaks of magnesite modified using [AEMIM]BF4 and [APMIM]BF4 at 1083 cm −1 and 1126 cm −1 are caused by the B-F bond [25]. Moreover, the strength of the imidazole rings are in the order of The morphology features of the calcined magnesite and ILs-modified magnesite were determined using the obtained SEM image.…”

Section: Properties Of the Adsorbentsmentioning

confidence: 99%

“…Although the CO 2 adsorption capacity of MgO was sufficiently high, its regeneration temperature was extremely high, which is the biggest problem for its industrial application. Ionic liquids (ILs) can address such a problem and exhibit superior CO 2 adsorption performance [24,25]; however, besides high cost, another drawback of pure ILs is their high viscosities causing strong gas diffusion resistances [26]. Therefore, for practical application, it will also be highly desirable to dispersedly immobilize ILs into a support in order to overcome the gas diffusion limitation.…”

Section: Introductionmentioning

confidence: 99%

CO2 Adsorption Performance and Kinetics of Ionic Liquid-Modified Calcined Magnesite

et al. 2021

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CO2 is a major contributor to global warming, and considerable efforts have been undertaken to capture and utilise it. Herein, a nanomaterial based on ionic liquid (IL)–modified calcined magnesites was investigated for CO2 capture. The synthesised nanomaterial (magnesite modified using [APMIM]Br) exhibited the best adsorption performance of 1.34 mmol/g at 30% IL loading amount, 50 °C, 0.4 MPa and 150 mL/min. In particular, the obtained nanomaterial could be regenerated at a low temperature of 90 °C for 3 h, and its CO2 adsorption capacity of 0.81 mmol/g was retained after eight cycles. FT-IR results showed that the imidazole ring and C–N group are directly related to CO2 adsorption capacity. Moreover, improving the conjugative effect of the imidazole ring enhanced the adsorption performance. Further, CO2 was adsorbed on the adsorbent surface and incomplete desorption decreased the BET surface area and CO2 adsorption capacity. Additionally, four models were selected to fit the adsorption kinetics. The results show that the adsorption mechanism fits the pseudo-first-order model well.

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Molecular sieve supported ionic liquids as efficient adsorbent for CO2 capture

Cited by 13 publications

References 4 publications

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Enhanced CO₂ Capture through SAPO-34 Impregnated with Ionic Liquid

CO2 Adsorption Performance and Kinetics of Ionic Liquid-Modified Calcined Magnesite

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Molecular sieve supported ionic liquids as efficient adsorbent for CO2 capture

Cited by 13 publications

References 4 publications

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Supported ionic liquids as highly efficient and low-cost material for CO2/CH4 separation process

Enhanced CO2 Capture through SAPO-34 Impregnated with Ionic Liquid

CO2 Adsorption Performance and Kinetics of Ionic Liquid-Modified Calcined Magnesite

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Product

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Enhanced CO₂ Capture through SAPO-34 Impregnated with Ionic Liquid