Application of polyethylenimine‐impregnated solid adsorbents for direct capture of low‐concentration CO<sub>2</sub>

Wang, Jitong; Wang, Mei; Li, Wencheng; Qiao, Wenming; Long, Donghui; Ling, Licheng

doi:10.1002/aic.14679

Cited by 81 publications

(81 citation statements)

References 63 publications

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“…The distinct behavior on the temperature effects on the adsorption in these two adsorbents is a reflection of amine distribution differences and residual porosity of adsorbents, as indicated by Wang et al . In the S/P100 samples, the viscous PEI with large molecules cannot disperse very well inside silica pores.…”

Section: Resultsmentioning

confidence: 84%

“…Many researchers reported PEI‐impregnated adsorbents with 50 % amine loading had the best adsorption temperature of 75 °C. Wang et al ,. found this optimum adsorption temperature was related to the residual porosity of the adsorbent though comparing the temperature relevant capacities of various PEI containing adsorbents.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, PEG may attract more water on surface of adsorbents to further promote CO 2 adsorption. Wang et al . investigated the effects of three additives of Span 80, CTAB and PEG on adsorption performance of PEI impregnated adsorbents.…”

Section: Introductionmentioning

confidence: 99%

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Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO₂ capture

2018

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High amine efficiency amine‐modified silica adsorbents with fast adsorption rates have been developed by adding amine species including hydroxyl groups into polyethyleneimine (PEI)‐loaded mesoporous silica for CO2 capture. Two amine species of diethanolamine (DEA) and 3‐amino‐1,2‐propanediol (AP) including hydroxyl groups were introduced into PEI to reduce the CO2 diffusion resistance and increase the active CO2 adsorption sites. The DEA promoted adsorbents were found to exhibit much higher adsorption capacity than AP promoted adsorbents. Through tuning the ratio of PEI to DEA in amine mixture during adsorbent impregnation step, a threshold value of PEI/DEA weight ratio (∼50 : 50) was found, where the maximum CO2 capacity of 2.93 mmol/g was achieved under dry CO2 at 35 °C.The adsorption capacity for this newly synthesized adsorbent increased by 50 % in comparison to PEI‐silica materials. Their amine efficiency was 0.40 mol CO2/mol N, which was more than twice than that of PEI‐silica (0.17 mol CO2/mol N). Under simulated humid flue gas conditions, the DEA promoted adsorbents had a CO2 breakthrough capacity qb of 1.57 mmol/g and a CO2 capacity q50 of 2.49 mmol/g. Such adsorbents possess good reversibility and the adsorption capacity is nearly stable after two adsorption‐desorption cycles. The synthesis methodology reported in this investigation proves to be an efficient strategy to develop highly efficient amine‐impregnated adsorbents.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

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Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO₂ capture

2018

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“…Owing to the complete conversion of imino groups into CO 2 -adsorbable amino groups,t he CO 2 adsorption capacities of IPEIA600-R, IPEIA1800-R, IPEIA10000-R, and IPEIA70000-R were improved by 2.19, 2.07, 1.95, and 1.84 mmolg À1 ,r espectively. As shown in Table 1, compared with other reportedP EI-supported mesoporousa dsorbents, [26][27][28][29] IPEIA-R showed ah igher adsorption capacity in the presence of moisture. It should be noted that overloading of PEI on mesoporousm atrix would lead to pore blockage and increase the CO 2 diffusion resistance;t hus causing ar eduction of the adsorption capacity and amino group utilization efficiency,p articularly at al ow temperature.…”

Section: Chemical Characterizationmentioning

confidence: 85%

Solid Amine Adsorbent Prepared by Molecular Imprinting and Its Carbon Dioxide Adsorption Properties

Zhuang

Chen

et al. 2016

Chemistry An Asian Journal

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A carbon dioxide imprinted solid amine adsorbent (IPEIA-R) with polyethylenimine (PEI) as a skeleton was conveniently prepared by using glutaraldehyde to cross-link carbon dioxide-preadsorbed PEI. As confirmed by FTIR, FT-Raman, and C NMR spectroscopy, CO preadsorbed on PEI could occupy the reactive sites of amino groups and act as a template for imprinting in the cross-linking process. The imino groups formed from the cross-linking reaction between glutaraldehyde and PEI could be reduced by NaBH to form CO -adsorbable amino groups. The adsorption results indicated that CO imprinting and reduction of imino groups by NaBH endowed the adsorbent with a higher CO adsorption capacity. Compared with PEI-supported mesoporous adsorbents, the solid amine adsorbent with PEI as a skeleton can avoid serious pore blockage and CO diffusion resistance, even with a high amine content. The solid amine adsorbent with PEI as a skeleton showed a remarkable CO adsorption capacity (8.56 mmol g ) in the presence of water at 25 °C, owing to the high amine content and good swelling properties. It also showed promising regeneration performance and could maintain almost the same CO adsorption capacity after 15 adsorption-desorption cycles.

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“…reported the use of polyethylenimine‐impregnated resin (HP20) for CO 2 adsorption, and its equilibrium adsorption amount could reach as high as 4.11 mmol/g from pure CO 2 and 2.25 mmol/g from 400 ppm CO 2 at 25 °C. Wang et al . also reported the use of polyethylenimine‐impregnated resin (HP2MGL) for CO 2 capture, and its equilibrium adsorption capacity was 1.96 mmol/g for 400 ppm CO 2 and 2.13 mmol/g for 5000 ppm CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and CO₂ adsorption behavior of amine‐functionalized porous polystyrene adsorbent

Liu

Chen

Gao

et al. 2017

J of Applied Polymer Sci

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A solid amine adsorbent was prepared by modifying a porous polystyrene resin (XAD‐4) with chloroacetyl chloride through a Friedel–Crafts acylation reaction, followed by aminating with tetraethylenepentamine (TEPA). The adsorption behavior of CO2 from a simulated flue gas on the solid amine adsorbent was evaluated. Factors that could determine the CO2 adsorption performance of the adsorbents such as amine species, adsorption temperature, and moisture were investigated. The experimental results showed that the solid amine adsorbent modified with TEPA (XAD‐4‐TEPA), which had a longer chain, showed an amine efficiency superior to the other two amine species with shorter chains. The CO2 adsorption capacity decreased obviously as the temperature increased because the reaction between CO2 and amine groups was an exothermic reaction, and its adsorption amount reached 1.7 mmol/g at 10 °C in dry conditions. The existence of water could significantly increase the CO2 adsorption amount of the adsorbent by promoting the chemical adsorption of CO2 on XAD‐4‐TEPA. The adsorbent kept almost the same adsorption amount after 10 cycles of adsorption–desorption. All of these results indicated that amine‐functionalized XAD‐4 resin was a promising CO2 adsorbent. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45046.

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Application of polyethylenimine‐impregnated solid adsorbents for direct capture of low‐concentration CO₂

Cited by 81 publications

References 63 publications

Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO₂ capture

Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO₂ capture

Solid Amine Adsorbent Prepared by Molecular Imprinting and Its Carbon Dioxide Adsorption Properties

Synthesis and CO₂ adsorption behavior of amine‐functionalized porous polystyrene adsorbent

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Application of polyethylenimine‐impregnated solid adsorbents for direct capture of low‐concentration CO2

Cited by 81 publications

References 63 publications

Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO2 capture

Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO2 capture

Solid Amine Adsorbent Prepared by Molecular Imprinting and Its Carbon Dioxide Adsorption Properties

Synthesis and CO2 adsorption behavior of amine‐functionalized porous polystyrene adsorbent

Contact Info

Product

Resources

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Application of polyethylenimine‐impregnated solid adsorbents for direct capture of low‐concentration CO₂

Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO₂ capture

Mixed Alkanolamine‐Polyethylenimine Functionalized Silica for CO₂ capture

Synthesis and CO₂ adsorption behavior of amine‐functionalized porous polystyrene adsorbent