Hexagonal Mesoporous Silica for carbon capture: Unrevealing CO2 microscopic dynamics by Nuclear Magnetic Resonance

Policicchio, Alfonso; Conte, Giuseppe; Agostino, R. G.; Caputo, Paolino; Rossi, Cesare Oliviero; Godbert, Nicolas; Nicotera, Isabella; Simari, Cataldo

doi:10.1016/j.jcou.2021.101809

Cited by 19 publications

(8 citation statements)

References 43 publications

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“…Various physical adsorbents such as carbonaceous material [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ], zeolite [ 22 ], ordered mesoporous silica [ 23 ], metal-organic frameworks (MOFs) [ 24 , 25 , 26 ], porous polymers [ 27 , 28 , 29 ] and membrane-based systems [ 30 ] have been investigated to capture CO 2 . Among these, porous carbons have been receiving significant attention for their wide-scale availability, ease of regeneration, low cost, high chemical/thermal stability, large surface area and capability of being tuned for applications not only for adsorbents but also for supercapacitors, battery electrodes and catalyst supports [ 31 , 32 , 33 , 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

Bai

Huang

et al. 2022

Molecules

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N-enriched porous carbons have played an important part in CO2 adsorption application thanks to their abundant porosity, high stability and tailorable surface properties while still suffering from a non-efficient and high-cost synthesis method. Herein, a series of N-doped porous carbons were prepared by a facile one-pot KOH activating strategy from commercial urea formaldehyde resin (UF). The textural properties and nitrogen content of the N-doped carbons were carefully controlled by the activating temperature and KOH/UF mass ratios. As-prepared N-doped carbons show 3D block-shaped morphology, the BET surface area of up to 980 m2/g together with a pore volume of 0.52 cm3/g and N content of 23.51 wt%. The optimal adsorbent (UFK-600-0.2) presents a high CO2 uptake capacity of 4.03 mmol/g at 0 °C and 1 bar. Moreover, as-prepared N-doped carbon adsorbents show moderate isosteric heat of adsorption (43–53 kJ/mol), acceptable ideal adsorption solution theory (IAST) selectivity of 35 and outstanding recycling performance. It has been pointed out that while the CO2 uptake was mostly dependent on the textural feature, the N content of carbon also plays a critical role to define the CO2 adsorption performance. The present study delivers favorable N-doped carbon for CO2 uptake and provides a promising strategy for the design and synthesis of the carbon adsorbents.

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Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

Bai

Huang

et al. 2022

Molecules

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“…Moreover, the adsorption of CO 2 can be achieved using various materials such as zeolites, activated carbon, amine-functionalized adsorbents, and metal-organic frameworks. [8,[11][12][13] These materials are particularly intriguing when they possess excellent gas sensitivity under atmospheric conditions, a characteristic also observed in several conducting polymers. Conducting polymers like polypyrrole, polyaniline, and polythiophene have been widely employed for gas sensing due to their favorable physical and mechanical properties.…”

Section: Introductionmentioning

confidence: 88%

“…However, amine‐based technologies have certain drawbacks associated with the waste treatment of degraded amine solvents and the inefficient energy required for regeneration. Moreover, the adsorption of CO 2 can be achieved using various materials such as zeolites, activated carbon, amine‐functionalized adsorbents, and metal‐organic frameworks [8,11–13] . These materials are particularly intriguing when they possess excellent gas sensitivity under atmospheric conditions, a characteristic also observed in several conducting polymers.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of polymeric Schiff's base for carbon dioxide adsorption

Siai,

Policicchio,

Alzahrani

et al. 2023

ChemistrySelect

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The increasing concentration of carbon dioxide in the atmosphere poses significant challenges for its capture. Carbon dioxide emissions contribute substantially to the greenhouse effect, leading to detrimental effects on ecosystems and drastic climate change. In this study, we synthesized two polymeric Schiff's bases, by condensing partially oxidized polyvinyl alcohol (OPVA) with 1,2‐ethylene diamine and 1,6‐hexamethylene diamine. The formed Schiff's bases are abbreviated OPVA‐ED and OPVA‐HMD, respectively. OPVA was initially prepared through oxidation of polyvinyl alcohol using potassium permanganate. We investigated the potential of these Schiff's bases for CO2 adsorption. Structural elucidation of the Schiff's bases was conducted using Fourier transform infrared (FTIR), 1H nuclear magnetic resonance (NMR), and X‐ray diffraction (XRD) techniques. Thermogravimetric analysis (TGA) and gas adsorption experiments were employed to determine their physical properties. The capture and release of CO2 were evaluated at a temperature of 25 °C using these Schiff's bases as adsorbents. The findings indicate that OPVA‐ED exhibits superior CO2 adsorption capacity compared to OPVA‐HMD, with adsorption capacities of 0.22 mmol/g and 0.18 mmol/g at 15 bars for OPVA‐ED and OPVA‐HMD, respectively.

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“…By modifying the silica surface, further decrement in the CO 2 diffusivity occurs due to higher adsorption . Despite the numerous NMR studies of CO 2 diffusion in various confining materials, − to the best of our knowledge no studies investigating the CO 2 –H 2 O mixture exist in the open literature.…”

Section: Aqueous Co2 Diffusion In Confined Mediamentioning

confidence: 99%

Diffusivity of CO₂ in H₂O: A Review of Experimental Studies and Molecular Simulations in the Bulk and in Confinement

Polat,

Coelho,

Vlugt

et al. 2024

J. Chem. Eng. Data

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An in-depth review of the available experimental and molecular simulation studies of CO 2 diffusion in H 2 O, which is a central property in important industrial and environmental processes, such as carbon capture and storage, enhanced oil recovery, and in the food industry is presented. The cases of both bulk and confined systems are covered. The experimental and molecular simulation data gathered are analyzed, and simple and computationally efficient correlations are devised. These correlations are applicable to conditions from 273 K and 0.1 MPa up to 473 K and 45 MPa. The available experimental data for diffusion coefficients of CO 2 in brines are also collected, and their dependency on temperature, pressure, and salinity is examined in detail. Other engineering models and correlations reported in literature are also presented. The review of the simulation studies focuses on the force field combinations, the data for diffusivities at low and high pressures, finite-size effects, and the correlations developed based on the Molecular Dynamics data. Regarding the confined systems, we review the main methods to measure and compute the diffusivity of confined CO 2 and discuss the main natural and artificial confining media (i.e., smectites, calcites, silica, MOFs, and carbon materials). Detailed discussion is provided regarding the driving force for diffusion of CO 2 and H 2 O under confinement, and on the role of effects such as H 2 O adsorption on hydrophilic confining media on the diffusivity of CO 2 . Finally, an outlook of future research paths for advancing the field of CO 2 diffusivity in H 2 O at the bulk phase and in confinement is laid out.

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Hexagonal Mesoporous Silica for carbon capture: Unrevealing CO2 microscopic dynamics by Nuclear Magnetic Resonance

Cited by 19 publications

References 43 publications

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

Preparation and characterization of polymeric Schiff's base for carbon dioxide adsorption

Diffusivity of CO₂ in H₂O: A Review of Experimental Studies and Molecular Simulations in the Bulk and in Confinement

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Hexagonal Mesoporous Silica for carbon capture: Unrevealing CO2 microscopic dynamics by Nuclear Magnetic Resonance

Cited by 19 publications

References 43 publications

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

One-Pot Synthesis of N-Rich Porous Carbon for Efficient CO2 Adsorption Performance

Preparation and characterization of polymeric Schiff's base for carbon dioxide adsorption

Diffusivity of CO2 in H2O: A Review of Experimental Studies and Molecular Simulations in the Bulk and in Confinement

Contact Info

Product

Resources

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Diffusivity of CO₂ in H₂O: A Review of Experimental Studies and Molecular Simulations in the Bulk and in Confinement