MXene-supported stable adsorbents for superior CO<sub>2</sub> capture

Liu, Fa‐Qian; Liu, Xin; Sun, Litao; Li, Rong-Xun; Yin, Chunxiao; Wu, Bozhen

doi:10.1039/d1ta01403j

Cited by 25 publications

(22 citation statements)

References 64 publications

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“…The broad resonance peaks from 90 to 170 ppm, centered near 125 ppm, are ascribed to the presence of aryl and condensed aryl carbon atoms . The successful crosslinking of PEI was further verified by the multiple peaks from 10 to 70 ppm, which are attributed to the carbon atoms of PEI and glutaraldehyde . A weak peak centered at about 165 ppm appeared after the exposure of KAC/PEI to the simulated flue gas, which is attributed to the carbamate ions, indicating the successful chemical reaction of CO 2 molecules and PEI. ,, …”

Section: Resultsmentioning

confidence: 84%

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Song

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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Under favorable regeneration conditions (120 °C, 100% CO 2 ), ultrafast adsorption kinetics and excellent long-term cycle stability are still the biggest obstacles for amine-based solid CO 2 adsorbents. Inspired by natural wood, a biochar with a highly ordered pore structure and excellent thermal conductivity was prepared and used as a carrier of organic amines to prepare ideal CO 2 adsorbents. The results showed that the prepared adsorbent has a very high adsorption working capacity (4.23 mmol CO 2 •g −1 ), and its performance remains stable even after 30 adsorption−desorption cycles in the harsh desorption environment (120 °C, 100% CO 2 ). Due to the existence of the hierarchical structure, the adsorbent exhibited ultra-fast adsorption kinetics, and the reaction rate constant is 37 times higher than that of traditional silica. This adsorbent also showed a very low regeneration heat of 1.64 MJ•kg −1 (CO 2 ), which is especially important for the practical application. Therefore, these biochar-based adsorbents derived from natural wood make the CO 2 capture process promising.

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Section: Resultsmentioning

confidence: 84%

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Song

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

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“…The cyclic CO 2 adsorption performance test results of samples are shown in Figure , which demonstrates the fine cyclic stability of 60%[C 2 OHmim][Lys]@GDX. This result proves the ability of supported ionic liquid to reduce the need for frequent adsorbent replacement in practical applications while also significantly lowering the price of CO 2 collection …”

Section: Resultsmentioning

confidence: 99%

“…This result proves the ability of supported ionic liquid to reduce the need for frequent adsorbent replacement in practical applications while also significantly lowering the price of CO 2 collection. 70 The adsorption active spots of carrier and supported ionic liquid are discovered by the temperature-programmed desorption (TPD) experiment. The maximum desorption temperature of the system is 150 °C until the CO 2 is completely desorbed to prevent the ionic liquid from decomposing.…”

Section: Ftir Analysis Of [C 2 Ohmim][lys] Gdx-103 and [C 2 Ohmim][ly...mentioning

confidence: 99%

Porous Polymer Supported Amino Functionalized Ionic Liquid for Effective CO₂ Capture

Yang

Xie

et al. 2023

Langmuir

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A decrease in CO 2 emissions is urgently required in the present situation due to the fast growth of carbon dioxide (CO 2 ) in the atmosphere, which has caused a series of global climate issues. This study used an impregnation−evaporation method to immobilize an amino functionalized ionic liquid [C 2 OHmim][Lys] on a chromatographic column filler GDX-103 and create a novel supported ionic liquid. The results showed that the supported ionic liquid with 60 wt % ionic liquid content had the best adsorption performance at 40 °C, and the CO 2 adsorption isotherm showed that the adsorption capacity at 0.1 MPa was 1.29 mmol CO 2 /g sorbent, which was 6 times greater than the adsorption capacity of the pure carrier. The sample with 60% ionic liquid content has an adsorption capacity of 1.02 mmol CO 2 /g sorbent under the condition of CO 2 /N 2 mixed gas with 10% CO 2 content. This is 43 times greater than the adsorption capacity of the pure carrier, and its adsorption performance is stable after three adsorption and desorption cycles. Through the rich porous structure of GDX-103, the ionic liquid is effectively supported and dispersed, which expands the contact area between CO 2 and ionic liquid and enhances the mass transfer of CO 2 . At the same time, CO 2 can be chemically bound to the groups on the anion of ionic liquid and be immobilized, so it has a high selective adsorption capacity of CO 2 , which makes it a great alternative to traditional CO 2 adsorbents.

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“…To inspect the adsorption rate after C17 modification, the CO 2 adsorption curves of een-MOF/Al-Si and een-MOF/Al-Si-C17-200 were obtained at 80 °C under 15% CO 2 (Figure S26). We employed the Avrami kinetic equation (eq ) to determine the adsorption rate, where Q t stands for adsorption capacity, Q e for the adsorption capacity at equilibrium time, K for the rate constant, t for time, and n for the kinetic order of the model The rate constant K corresponded to 0.0146 s –1 for een-MOF/Al-Si and 0.0148 s –1 for een-MOF/Al-Si-C17-200 , indicating that the rate remained invariant, even after C17 modification (Table S2).…”

Section: Resultsmentioning

confidence: 99%

Functionalization of Diamine-Appended MOF-Based Adsorbents by Ring Opening of Epoxide: Long-Term Stability and CO₂ Recyclability under Humid Conditions

et al. 2022

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Although diamine-appended metal–organic framework (MOF) adsorbents exhibit excellent CO2 adsorption performance, a continuous decrease in long-term capacity during repeated wet cycles remains a formidable challenge for practical applications. Herein, we present the fabrication of diamine-appended Mg2(dobpdc)-alumina beads (een-MOF/Al-Si-Cx ; een = N-ethylethylenediamine; x = number of carbon atoms attached to epoxide) coated with hydrophobic silanes and alkyl epoxides. The reaction of epoxides with diamines in the portal of the pore afforded sufficient hydrophobicity, hindered the penetration of water vapor into the pores, and rendered the modified diamines less volatile. een-MOF/Al-Si-C17-200 (een-MOF/Al-Si-C17-y ; y = 50, 100, and 200, denoting wt % of C17 with respect to the bead, respectively), with substantial hydrophobicity, showed a significant uptake of 2.82 mmol g–1 at 40 °C and 15% CO2, relevant to flue gas concentration, and a reduced water adsorption. The modified beads maintained a high CO2 capacity for over 100 temperature-swing adsorption cycles in the presence of 5% H2O and retained CO2 separation performance in breakthrough tests under humid conditions. This result demonstrates that the epoxide coating provides a facile and effective method for developing promising adsorbents with high CO2 adsorption capacity and long-term durability, which is a required property for postcombustion applications.

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MXene-supported stable adsorbents for superior CO₂ capture

Abstract: Ti3C2(OH)x–polyethyleneimine-1,2-butylene oxide (Ti3C2/PEI/BO) nanocomposite with superior CO2 capture performance.

Cited by 25 publications

References 64 publications

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Porous Polymer Supported Amino Functionalized Ionic Liquid for Effective CO₂ Capture

Functionalization of Diamine-Appended MOF-Based Adsorbents by Ring Opening of Epoxide: Long-Term Stability and CO₂ Recyclability under Humid Conditions

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MXene-supported stable adsorbents for superior CO2 capture

Abstract: Ti3C2(OH)x–polyethyleneimine-1,2-butylene oxide (Ti3C2/PEI/BO) nanocomposite with superior CO2 capture performance.

Cited by 25 publications

References 64 publications

Wood-Inspired Ultrafast High-Performance Adsorbents for CO2 Capture

Wood-Inspired Ultrafast High-Performance Adsorbents for CO2 Capture

Porous Polymer Supported Amino Functionalized Ionic Liquid for Effective CO2 Capture

Functionalization of Diamine-Appended MOF-Based Adsorbents by Ring Opening of Epoxide: Long-Term Stability and CO2 Recyclability under Humid Conditions

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Product

Resources

About

MXene-supported stable adsorbents for superior CO₂ capture

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Porous Polymer Supported Amino Functionalized Ionic Liquid for Effective CO₂ Capture

Functionalization of Diamine-Appended MOF-Based Adsorbents by Ring Opening of Epoxide: Long-Term Stability and CO₂ Recyclability under Humid Conditions