Continuous CO2 capture and MSWI fly ash stabilization, utilizing novel dynamic equipment |
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| Authors: | Jian-guo Jiang Xue-juan Du Mao-zhe Chen Chang Zhang |
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| Institution: | aDepartment of Environmental Science and Engineering, Tsinghua University, 100084 Beijing, PR China;bKey Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, PR China |
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| Abstract: | Novel dynamic equipment with gas in and out continuously was developed to study the capture capacity of CO2. Municipal solid waste incineration (MSWI) fly ash has a high capture rate of CO2 in CO2-rich gas. Fly ash can sequester pure CO2 rapidly, and its capacity is 16.3 g CO2/100 g fly ash with no water added and 21.4 g CO2/100 g fly ash with 20% water added. For simulated incineration gas containing 12% CO2, the capture rate decreased and the capacity was 13.2 g CO2/100 g fly ash with no water added and 18.5 g CO2/100 g fly ash with 20% water added. After accelerated carbonation, the C and O contents increased, indicating CO2 capture in the fly ash; CO2 combines with Ca(OH)2 to form CaCO3, which increased the CaCO3 content from 12.5 to 54.3%. The leaching of Pb markedly decreased from 24.48 to 0.111 mg/L. |
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| Keywords: | Municipal solid waste incineration (MSWI) Fly ash Heavy metal Stabilization CO2 capture |
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