Amine functionalized mesocellular silica foam as highly efficient sorbents for CO2 capture

Bai, Fengtian; Liu, Xin; Sani, Suleiman; Liu, Yumin; Guo, Wei

doi:10.1016/j.seppur.2022.121539

Cited by 24 publications

(4 citation statements)

References 76 publications

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“…Moreover, differences in surface chemistries in support materials can result in different binding motifs between the amine and the support, which also has the potential to influence the CO 2 capture performance. A variety of porous support materials have been used for amine impregnation, including silica, − γ-alumina, − MOFs, − zeolite, and mixed metal oxides. , Despite this, the effects of amine-solid support interactions on CO 2 adsorption behavior are still poorly understood. Furthermore, most prior DAC studies are limited to adsorption temperatures above indoor ambient room temperature (>20 °C).…”

Section: Introductionmentioning

confidence: 99%

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO₂ on Supported Amines

et al. 2023

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A variety of amine-impregnated porous solid sorbents for direct air capture (DAC) of CO 2 have been developed, yet the effect of amine-solid support interactions on the CO 2 adsorption behavior is still poorly understood. When tetraethylenepentamine (TEPA) is impregnated on two different supports, commercial γ-Al 2 O 3 and MIL-101(Cr), they show different trends in CO 2 sorption when the temperature (−20 to 25 °C) and humidity (0−70% RH) of the simulated air stream are varied. In situ IR spectroscopy is used to probe the mechanism of CO 2 sorption on the two supported amine materials, with weak chemisorption (formation of carbamic acid) being the dominant pathway over MIL-101(Cr)-supported TEPA and strong chemisorption (formation of carbamate) occurring over γ-Al 2 O 3supported TEPA. Formation of both carbamic acid and carbamate species is enhanced over the supported TEPA materials under humid conditions, with the most significant enhancement observed at −20 °C. However, while equilibrium H 2 O sorption is high at cold temperatures (e.g., −20 °C), the effect of humidity on a practical cyclic DAC process is expected to be minimal due to slow H 2 O uptake kinetics. This work suggests that the CO 2 capture mechanisms of impregnated amines can be controlled by adjusting the degree of amine-solid support interaction and that H 2 O adsorption behavior is strongly affected by the properties of the support materials. Thus, proper selection of solid support materials for amine impregnation will be important for achieving optimized DAC performance under varied deployment conditions, such as cold (e.g., −20 °C) or ambient temperature (e.g., 25 °C) operations.

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Section: Introductionmentioning

confidence: 99%

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO₂ on Supported Amines

et al. 2023

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“…17,33 The total amine loadings, calculated based on TGA, were corroborated by CHN elemental analysis, with values closely matching. MeOX-based sorbents demonstrated the highest nitrogen content, reaching 13.31 mmol N per g sorbent, one of the highest reported values in the literature, 24,47,48 followed by EtOX-based materials and PhOX, as shown in Table 2. This journal is © The Royal Society of Chemistry 2024 a Calculated based on the difference between 150 °C and 800 °C from TGA.…”

Section: Characterizationmentioning

confidence: 85%

Ambient and sub-ambient temperature direct air CO₂ capture (DAC) by novel supported in situ polymerized amines

Al-Absi,

Benneker,

Mahinpey

2024

J. Mater. Chem. A

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“…However, creating these specific structures typically relies on a template-assisted method utilizing surfactants (e. g., cetyltrimethylammonium bromide: CTAB, cetyltrimethylammonium chloride: CTAC) or block-copolymers (e. g., Pluronic P123, Pluronic F127). [47,[51][52] Whereas, chemical additives such as 1,3,5trimethylbenzene (TMB), 1,3,5-triisopropylbenzene (TIPB) and dimethyldecylamine (DMDA) are requisite for generating enlarged pore windows, [53][54][55] which can lead to considerable expenses in terms of material costs and intricate synthesis procedures. Additionally, many surfactants and synthesized polymers can carry toxic properties, posing notable environmental risks.…”

Section: Introductionmentioning

confidence: 99%

Utilizing Gelatin Waste for Efficient Bimodal Porous Silica Adsorbents for Carbon Dioxide Capture

Numpilai,

Witoon

2023

ChemPlusChem

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This study explores the modification of pore structures in porous silica materials synthesized using sodium silicate and waste gelatin, under varying silica‐to‐gelatin ratios. At ratios of 1.0–1.5, bimodal porous silica with mesopores and macropores emerged due to spaces between silica nanoparticles and clusters, following gelatin elimination. The study further evaluated the obtained bimodal porous silica as polyethyleneimine (PEI) supports for CO2 capture, alongside PEI‐loaded unimodal porous silica and hollow silica sphere for comparison. Notably, the PEI‐loaded bimodal silica showcased superior CO2 uptake, achieving 145.6 mg g−1 at 90 °C. Transmission electron microscopy (TEM) revealed PEI′s uniform distribution within the pores of bimodal silica, unlike the excessive surface layering seen in unimodal silica. Conversely, PEI completely filled the hollow porous silica‘s interior, extending gas molecule diffusion distance. All sorbents displayed nearly constant CO2 adsorption across 20 cycles, demonstrating outstanding stability. Notably, the bimodal porous silica displayed a negligible capacity loss, underscoring its robust performance.

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Amine functionalized mesocellular silica foam as highly efficient sorbents for CO2 capture

Cited by 24 publications

References 76 publications

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO₂ on Supported Amines

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO₂ on Supported Amines

Ambient and sub-ambient temperature direct air CO₂ capture (DAC) by novel supported in situ polymerized amines

Utilizing Gelatin Waste for Efficient Bimodal Porous Silica Adsorbents for Carbon Dioxide Capture

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Amine functionalized mesocellular silica foam as highly efficient sorbents for CO2 capture

Cited by 24 publications

References 76 publications

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO2 on Supported Amines

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO2 on Supported Amines

Ambient and sub-ambient temperature direct air CO2 capture (DAC) by novel supported in situ polymerized amines

Utilizing Gelatin Waste for Efficient Bimodal Porous Silica Adsorbents for Carbon Dioxide Capture

Contact Info

Product

Resources

About

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO₂ on Supported Amines

Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO₂ on Supported Amines

Ambient and sub-ambient temperature direct air CO₂ capture (DAC) by novel supported in situ polymerized amines