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http://dx.doi.org/10.9713/kcer.2017.55.3.419

Performance Evaluation of K-based Solid Sorbents Depending on the Internal Structure of the Carbonator in the Bench-scale CO2 Capture Process  

Kim, Jae-Young (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Lim, Ho (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Woo, Je Min (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Jo, Sung-Ho (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Moon, Jong-Ho (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Lee, Seung-Yong (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Lee, Hyojin (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Yi, Chang-Keun (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Lee, Jong-Seop (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Min, Byoung-Moo (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Park, Young Cheol (Greenhouse Gas Research Laboratory, Korea Institute of Energy Research)
Publication Information
Korean Chemical Engineering Research / v.55, no.3, 2017 , pp. 419-425 More about this Journal
Abstract
In this study, the performance characteristics of the K-based sorbents (KEP-CO2P2, KEPCO RI, Korea) has been studied in relation with the heat exchanger structure and shape in a mixing zone of the carbonator in the bench-scale dry $CO_2$ capture process. Two types of heat exchangers (different structure and shape) were used in the carbonator as CASE 1 and CASE 2, in which the experiment has been continuously performed under the same operating conditions. During the continuous operation, working temperature of carbonator was 75 to $80^{\circ}C$, that of regenerator was 190 to $200^{\circ}C$, and $CO_2$ inlet concentration of the feed gas was 12 to 14 vol%. Especially, to compare the dynamic sorption capacity of sorbents, the differential pressure of the mixing zone in the carbonator was maintained around 400 to 500 mm $H_2O$. Also, solid samples from the carbonator and the regenerator were collected and weight variation of those samples was evaluated by TGA. The $CO_2$ removal efficiency and the dynamic sorption capacity were 64.3% and 2.40 wt%, respectively for CASE 1 while they were 81.0% and 4.66 wt%, respectively for CASE 2. Also, the dynamic sorption capacity of the sorbent in CASE 1 and CASE 2 was 2.51 wt% and 4.89 wt%, respectively, based on the weight loss of the TGA measurement results. Therefore, It was concluded that there could be a difference in the performance characteristics of the same sorbents according to the structure and type of heat exchanger inserted in the carbonator under the same operating conditions.
Keywords
K-based Sorbent; $CO_2$ Capture process; Internal structure; Performance evaluation; Dynamic sorption capacity;
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Times Cited By KSCI : 2  (Citation Analysis)
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