Effect of water pretreatment on CO2 capture using a potassium-based solid sorbent in a bubbling fluidized bed reactor

• Published in: The Korean journal of chemical engineering Vol. 24; no. 3; pp. 457 - 460
• Main Authors: Seo, Yongwon, Jo, Sung-Ho, Ryu, Ho-Jung, Dal Bae, Hee, Ryu, Chong Kul, Yi, Chang-Keun
• Format: Journal Article
• Language: English
• Published: 한국화학공학회 01.05.2007
• Subjects: 화학공학
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-007-0079-6

A bubbling fluidized bed reactor was used to study CO 2 capture from flue gas by using a potassium-based solid sorbent, sorbKX35 which was manufactured by the Korea Electric Power Research Institute. A dry sorbent, sorbKX35, consists of K 2 CO 3 for absorption and supporters for mechanical strength. To increase initial CO 2 removal, some amount of H 2 O was absorbed in the sorbent before injecting simulated flue gas. It was possible to achieve 100 % CO 2 r e m o v a l f o r m o r e t h a n 1 0 m i n u t e s a t 6 0 o C a n d a r e s i d e n c e t i m e o f 2 s w i t h H 2 O pretreatment. When H 2 O pretreatment time was long enough to convert K 2 CO 3 of sorbKX35 into K 2 CO 3 ·1.5H 2 O, CO 2 removal was excellent. The results obtained in this study can be used as basic data for designing and operating a large scale CO 2 capture process with two fluidized bed reactors. KCI Citation Count: 49