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Influence of support of K2CO3 for CO2 capture

https://doi.org/10.1016/j.ccst.2021.100011

“To enhance carbonation performance, different supports have been employed to prepare supported potassium-based adsorbents. Supports generally perform many different functions, e.g., provide a large surface area for the uniform dispersion of K2CO3 thereon for improved K2CO3 utilization efficiency, offer enough space to accommodate active component for increased K2CO3 loading, afford more pore channels to facilitate gas diffusion, and provide massive alkaline active sites to promote CO2 adsorption. The reported supporting materials are divided into four categories: carbon-based supports, mesoporous Al2O3metal oxides, and waste-derived supports. Textural properties and multi-cycle CO2 adsorption capacities of K2CO3 loaded on different supports are summarized in Table 1 and Fig. 5.

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Fig. 5. Multi-cycle CO2 adsorption capacities of potassium-based adsorbents with different supports. (a) carbon supported K2CO3 adsorbents; (b) mesoporous Al2O3 supported K2CO3 adsorbents; (c) K2CO3 loaded on metal oxides supports; (d) K2CO3 loaded on waste-derived supports.”

 

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