期刊
CHEMICAL ENGINEERING JOURNAL
卷 219, 期 -, 页码 262-272出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.12.081
关键词
CO2 capture capacity; CO2 adsorption; Flow regime; K2CO3; Fluidization; CO2 breakthrough
资金
- National Research Council of Thailand
- Energy Policy and Planning office of Ministry of Energy
- Center of Excellence on Petrochemicals and Materials Technology of Chulalongkorn University
CO2 capture from flue gas using a potassium carbonate supported on alumina (K2CO3/Al2O3) solid sorbent was investigated in different flow patterns/regimes in fluidized bed/semi circulating fluidized bed made from glass reactor at low temperature 60 degrees C. The semi-circulating fluidized bed reactor has 0.025 m of inner diameter and 0.80 m of height. The CO2 capture capacity were measured in the presence of H2O for five different flow patterns/regimes including fixed bed, multiple bubbling, slugging, turbulent and fast fluidization. It can be found that the fixed bed and multiple-bubbling bed could adsorb all CO2 in flue gas (CO2 removal fraction = 1) during 17 min and 10 min, respectively. The slugging, turbulent and fast fluidization could not remove 100% of CO2 in feed gas. Maximum CO2 removal fractions for slugging, turbulent and fast fluidization were 0.98, 0.94 and 0.72, respectively. However, the turbulent regime provided the best CO2 capture capacity at about 90% of stoichiometric theoretical value. The CO2 capture capacity for the multiple-bubbling and fast fluidization regimes were lower with about 66-72% of stoichiometric theoretical value. The fixed bed and slugging regimes provided the poorest CO2 capture capacity at about 53-60% of stoichiometric theoretical value. From all the obtained results, the CO2 capture capacity of the sorbent changed dramatically depending on the flow patterns/regimes in fluidized bed/circulating fluidized bed. (C) 2013 Elsevier B.V. All rights reserved.
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