Influence of surface modification on selective CO2 adsorption: A technical review on mechanisms and methods

Petrovic, Ben; Gorbounov, Mikhail; Soltani, Salman Masoudi

doi:10.1016/j.micromeso.2020.110751

Cited by 192 publications

(90 citation statements)

References 391 publications

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“…A comparison of the parameters of porous structures of two second generation dendrimers with and without pyridyl units using the CO 2 adsorption, allows us to propose that the larger specific surface area of G2-PhPy than that of G2-PhPh is associated with the presence of pyridine groups, since the nitrogen-containing moieties in an adsorbent increase the adsorption of CO 2 , whose molecules possess a quadrupole moment [31][32][33][34][35][36][37][38][39].…”

Section: Resultsmentioning

confidence: 99%

“…This makes CO 2 sensitive to the presence of polar or charged groups on an adsorbent surface. In fact, the presence of the nitrogen-containing moieties acting as centers of CO 2 adsorption favors its adsorption by the adsorbent [31][32][33][34][35][36][37][38][39]. Unlike low-temperature N 2 adsorption (77 K), CO 2 adsorption is usually measured at 273 K, which leads to a higher diffusion rate of this gas and provides a better penetration into micropores [31].…”

Section: Introductionmentioning

confidence: 99%

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Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factors

et al. 2021

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The porous structure of second- and third-generation polyphenylene-type dendrimers was investigated by adsorption of N2, Ar, and CO2 gases, scanning electron microscopy and small-angle X-ray spectroscopy. Rigid dendrimers in bulk are microporous and demonstrate a molecular sieve effect. When using CO2 as an adsorbate gas, the pore size varies from 0.6 to 0.9 nm. This is most likely due to the distances between dendrimer macromolecules or branches of neighboring dendrimers, whose packing is mostly realized due to intermolecular interactions, in particular, π–π interactions of aromatic fragments. Intermolecular interactions prevent the manifestation of the porosity potential inherent to the molecular 3D structure of third-generation dendrimers, while for the second generation, much higher porosity is observed. The maximum specific surface area for the second-generation dendrimers was 467 m2/g when measured by CO2 adsorption, indicating that shorter branches of these dendrimers do not provide dense packing. This implies that the possible universal method to create porous materials for all kinds of rigid dendrimers is by a placement of bulky substituents in their outer layer.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factors

et al. 2021

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“…This goal can be achieved via a significant reduction in global anthropogenic greenhouse gas (GHG) emissions, among which carbon dioxide plays a key role. For instance, the UK government in June 2019 has announced their commitment to reduce (GHGs) emissions to net zero (in comparison to year 1990) by 2050 [2] and in November 2020 have announced "The Ten-Point Plan" which would mobilise £12 billion of governmental investment [3] thus, accelerating a great deal of research and industrial implementation of Carbon Dioxide Removal (CDR) processes. Out of all the various CDR techniques, Carbon Capture, Utilisation and Storage (CCUS) is regarded as one of the most promising tools for decarbonising industry and the power sector in short-to medium terms thus, playing a crucial role in the uphill battle against climate change.…”

Section: Introductionmentioning

confidence: 99%

Application of Nanoporous Carbon, Extracted from Biomass Combustion Ash, in CO₂ Adsorption

Gorbounov

Petrovic

Lahiri

et al. 2021

2021 IEEE 21st International Conference on Nanotechnology (NANO)

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Bioenergy with Carbon Capture and Storage has been regarded as one of the most prominent technologies in the battle against climate change as stated in the latest Intergovernmental Panel on Climate Change reports.However, solid residues generated during the combustion of biomass pose a separate set of environmental and economic challenges that must be addressed. In order to utilise the full potential of this waste stream, an effective nanoporous carbonaceous adsorbent for CO2 capture has been directly prepared via a simple and low-cost extraction technique from industrial-grade biomass combustion bottom ash generated at a UK power plant. The adsorbent characterisation data (via Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy as well as Fourier-Transform Infrared Spectroscopy) agrees well with the CO2 adsorption curves obtained through thermogravimetric analysis (TGA). The TGA results have revealed a CO2 adsorption capacity of 0.73 mmol/g at 25 °C and 1 atm under a pure CO2 gas stream, thus, proposing a promising and viable route towards in-situ decarbonisation of the biomass combustion sector in the UK via effective waste valorisation.

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“…[11] In general, acidic surfaces have been related to oxide groups which are the fragments of chemisorbed oxygen found on carbon surfaces that were created when exposed or treated with an oxidizing agent. [12] The acidic functional groups on carbon surfaces, like carboxyl, carbonyls, phenol, and lactones, have been anchored by treatment with acids. [13] These oxygencontaining functional groups on the surface are easily accessible for further modification and used as an adsorbent in different applications.…”

Section: Introductionmentioning

confidence: 99%

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO₂ Capture

et al. 2021

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The coconut shell-based activated carbon (AC) surface was effectively anchored with amine moieties with acid treatment followed by tetraethylenepentamine (TEPA) anchoring. The activated carbon surface enhanced with basicity is likely to increase the sorbent properties towards CO 2 adsorption. The AC surface was modified by varying TEPA concentrations. After amine doping, significant loss in textural property indicates their occupation inside the pores and surfaces. Further, the samples were thermally activated to retrieve the textural properties. The physicochemical properties of modified carbon were characterized using BET, TPD, FT-IR, Raman spectroscopy and elemental composition. The amine-modified and thermally activated carbons were tested for CO 2 adsorption up to 25 bar at 25°C. The acid-base properties of N-doped carbons were evaluated using isopropanol as a model test reaction at atmospheric pressure. The IPA reaction products of acetone and propene were quantified for their acid-base nature and correlated to CO 2 adsorption capacities. The CO 2 adsorption capacity increases by tailoring synergistic properties between surface basicity and micropores. Hence, 20 % TEPA-derived nitrogen-enriched carbon reveals a higher yield of acetone 73 %, which in turn enhanced CO 2 adsorption capacity of 9.9 mmol/g, and it is found to be a suitable applicant for CO 2 capture.

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Influence of surface modification on selective CO2 adsorption: A technical review on mechanisms and methods

Cited by 192 publications

References 391 publications

Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factors

Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factors

Application of Nanoporous Carbon, Extracted from Biomass Combustion Ash, in CO₂ Adsorption

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO₂ Capture

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Influence of surface modification on selective CO2 adsorption: A technical review on mechanisms and methods

Cited by 192 publications

References 391 publications

Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factors

Porosity of Rigid Dendrimers in Bulk: Interdendrimer Interactions and Functionality as Key Factors

Application of Nanoporous Carbon, Extracted from Biomass Combustion Ash, in CO2 Adsorption

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO2 Capture

Contact Info

Product

Resources

About

Application of Nanoporous Carbon, Extracted from Biomass Combustion Ash, in CO₂ Adsorption

The Synergistic Character of Highly N‐Doped Coconut–Shell Activated Carbon for Efficient CO₂ Capture