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알루미나를 사용한 K₂CO₃ 기반 건식 흡수제의 CO₂ 흡수 및 재생 특성
조민선(Min Sun Cho),채호진(Ho Jin Chae),이수출(Soo Chool Lee),류민영(Min Young Ryu),이중범(Joong Beom Lee),백점인(Jeom-In Baek),김재창(Jae Chang Kim) 한국에너지기후변화학회 2017 에너지기후변화학회지 Vol.12 No.1
Various alumina materials (γ-Al₂O₃, δ-Al₂O₃, α-Al₂O₃), which were used as supports, were prepared by calcination at 600, 950 and 1100 °C, respectively. The potassium-based sorbents were fabricated by impregnating K₂CO₃ on the various alumina materials. The potassium-based sorbents using γ-Al₂O₃ or δ-Al₂O₃ as a support showed high CO₂ capture capacities of 91.3 mg CO₂/g sorbent and 94.4 mg CO₂/g sorbent, respectively, at 1 cycle in the presence of 1 vol.% CO₂ and 9 vol.% H₂O at 60 °C. However, their CO₂ capture capacities decreased with increasing the cycle number from 1 to 2. On the other hand, the CO₂ capture capacities of the potassium-based sorbent using α-Al₂O₃ showed 86~91 mg CO₂/g sorbent during multiple cycles. These results are due to the fact that the regeneration properties of the potassium-based sorbent using alumina materials are affected by alumina structures.