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- W3148349146 abstract "Mesoporous MgO is a promising candidate for CO2 capture. In this study, MgO pellets were activated via hydration and the effects of the process on the texture, structures, and CO2 adsorption properties of the pelletized MgO adsorbents were systematically studied. Two adsorption kinetics models were used to investigate the CO2 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 CO2 adsorption capacity and equilibrium rate constant. The increase in CO2 adsorption capacity was attributed to the development of their structure rather than the reaction of Mg(OH)2 with CO2. 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 CO2 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 CO2 capture." @default.
- W3148349146 created "2021-04-13" @default.
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- W3148349146 date "2021-03-30" @default.
- W3148349146 modified "2023-09-23" @default.
- W3148349146 title "Hydration Activation of MgO Pellets for CO<sub>2</sub> Adsorption" @default.
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- W3148349146 doi "https://doi.org/10.1021/acs.iecr.0c05462" @default.
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