Regenerable magnesium-based sorbent for high-pressure and moderate-temperature CO2 capture: Physicochemical structures and capture performances

Hao, Feng; Wu, Shiyong; Huang, Sheng; Wu, Youqing; Gao, Jin‐Sheng

doi:10.1016/j.fuel.2015.07.020

Cited by 11 publications

(3 citation statements)

References 38 publications

(80 reference statements)

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“…The values of the fractal dimension (F) were always in the range of 2−3, which described the pore structure and surface fractal dimensions of the porous materials, and were obtained using the Frenkel−Halsey−Hill (FHH) equation with data from the N 2 gas adsorption−desorption isotherm. 42,43 The FHH model can be described as follows 44,45 V H…”

Section: Methodsmentioning

confidence: 99%

“…The crystalline structures of the samples were recorded via a X-ray diffractometer (Rigaku D/Max 2500pc) with Cu K radiation in the 2θ range of 10–90°. The values of the fractal dimension ( F ) were always in the range of 2–3, which described the pore structure and surface fractal dimensions of the porous materials, and were obtained using the Frenkel–Halsey–Hill (FHH) equation with data from the N 2 gas adsorption–desorption isotherm. , The FHH model can be described as follows , where P 0 and P are the saturation and equilibrium pressures, respectively, V is the volume of N 2 adsorbed at equilibrium pressure P ; H is the slope of the graph of ln V versus ln(ln( p 0 / p )), and C is constant. The lowest value of F ( F = 2) corresponds to a perfectly smooth surface and ordered pore size distribution, whereas as F increases, the surface becomes rough and the pore size distribution becomes disordered .…”

Section: Experimental Sectionmentioning

confidence: 99%

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Hydration Activation of MgO Pellets for CO₂ Adsorption

Ding

Zhao

Chen

et al. 2021

Ind. Eng. Chem. Res.

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Mesoporous MgO is a promising candidate for CO 2 capture. In this study, MgO pellets were activated via hydration and the effects of the process on the texture, structures, and CO 2 adsorption properties of the pelletized MgO adsorbents were systematically studied. Two adsorption kinetics models were used to investigate the CO 2 adsorption kinetics of the pelletized MgO adsorbents. Simultaneously, their kinetic parameters and the influence of adsorption temperatures were determined. It was found that a 3D, flaky, inter-connected network structure appeared after hydration. The hydration process significantly improved the pore structure of the adsorbent and thereby improved the CO 2 adsorption capacity and equilibrium rate constant. The increase in CO 2 adsorption capacity was attributed to the development of their structure rather than the reaction of Mg(OH) 2 with CO 2 . The results of a kinetics study showed that a pseudo-second-order model was suitable for predicting the entire adsorption process. Meanwhile, the equilibrium kinetics rate constant of CO 2 capture increased with adsorption temperature, but the initial adsorption rate was mainly related to the texture and structures of the adsorbents. Consequently, hydration by steam or liquid water was deemed an effective method for improving the adsorption performance of MgO pellets, and the hydrated adsorbents were suitable for use in practical CO 2 capture.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Hydration Activation of MgO Pellets for CO₂ Adsorption

Ding

Zhao

Chen

et al. 2021

Ind. Eng. Chem. Res.

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show abstract

“…CO 2 capture using membranes operates on the principle of differences in the physical or chemical interaction between the CO 2 gas and the membrane for which the membrane is designed in such a way as to allow one gas to pass through faster than the other. The membrane modules can also be used as a gas absorption column or as a conventional membrane separation unit [124][125][126][127][128]. Although the membrane technology is relatively new, it requires high energy during separation, and it is widely known for its poor selectivity [129][130][131][132][133][134][135].…”

Section: Membrane Separationmentioning

confidence: 99%

The Potential of CO2 Capture and Storage Technology in South Africa’s Coal-Fired Thermal Power Plants

Yoro

Sekoai

2016

Environments

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Abstract:The global atmospheric concentration of anthropogenic gases, such as carbon dioxide, has increased substantially over the past few decades due to the high level of industrialization and urbanization that is occurring in developing countries, like South Africa. This has escalated the challenges of global warming. In South Africa, carbon capture and storage (CCS) from coal-fired power plants is attracting increasing attention as an alternative approach towards the mitigation of carbon dioxide emission. Therefore, innovative strategies and process optimization of CCS systems is essential in order to improve the process efficiency of this technology in South Africa. This review assesses the potential of CCS as an alternative approach to reducing the amount CO 2 emitted from the South African coal-fired power plants. It examines the various CCS processes that could be used for capturing the emitted CO 2 . Finally, it proposes the use of new adsorbents that could be incorporated towards the improvement of CCS technology.

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Preparation and Characterization of Hydrotalcite-Derived Material from Mullite-Rich Tailings (II): CO2 Capture from Coal-Fired Thermal Power Plants

Okanigbe

Merwe

2023

Resource Recovery and Recycling From Waste Metal Dust

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Regenerable magnesium-based sorbent for high-pressure and moderate-temperature CO2 capture: Physicochemical structures and capture performances

Cited by 11 publications

References 38 publications

Hydration Activation of MgO Pellets for CO₂ Adsorption

Hydration Activation of MgO Pellets for CO₂ Adsorption

The Potential of CO2 Capture and Storage Technology in South Africa’s Coal-Fired Thermal Power Plants

Preparation and Characterization of Hydrotalcite-Derived Material from Mullite-Rich Tailings (II): CO2 Capture from Coal-Fired Thermal Power Plants

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Regenerable magnesium-based sorbent for high-pressure and moderate-temperature CO2 capture: Physicochemical structures and capture performances

Cited by 11 publications

References 38 publications

Hydration Activation of MgO Pellets for CO2 Adsorption

Hydration Activation of MgO Pellets for CO2 Adsorption

The Potential of CO2 Capture and Storage Technology in South Africa’s Coal-Fired Thermal Power Plants

Preparation and Characterization of Hydrotalcite-Derived Material from Mullite-Rich Tailings (II): CO2 Capture from Coal-Fired Thermal Power Plants

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Product

Resources

About

Hydration Activation of MgO Pellets for CO₂ Adsorption

Hydration Activation of MgO Pellets for CO₂ Adsorption