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Abstract

In this study, the efficiency of a low-cost K₂CO₃/Al₂O₃ sorbent as a CO₂ capture support was investigated. The sorbent was prepared by impregnating K₂CO₃ on industrial-grade Al₂O₃. The CO₂ capture capacity of the sorbent was calculated from the breakthrough curve of the CO₂ adsorption inside a fixed-bed reactor, in the presence of H²O and at an adsorption temperature of 60 °C. An adsorption capacity of 75.4 mg CO₂/g of sorbent was obtained. The stability of capture capacity of the sorbent was higher than that of the reference sorbent. The changes in the pore volume and surface area were 0.020 cm³/g and 5.5 m²/g, respectively, after five cycles of adsorption and regeneration. However, there were minor changes in the pore-size distribution and surface area of the sorbent after five cycles. This sorbent can be considered to be used in large-scale applications.

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Abstract

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