Continuous CO(2) capture and MSWI fly ash stabilization, utilizing novel dynamic equipment.
Novel dynamic equipment with gas in and out continuously was developed to study the capture capacity of CO(2). Municipal solid waste incineration (MSWI) fly ash has a high capture rate of CO(2) in CO(2)-rich gas. Fly ash can sequester pure CO(2) rapidly, and its capacity is 16.3 g CO(2)/100 g fly ash with no water added and 21.4 g CO(2)/100 g fly ash with 20% water added. For simulated incineration gas containing 12% CO(2), the capture rate decreased and the capacity was 13.2 g CO(2)/100 g fly ash with no water added and 18.5 g CO(2)/100 g fly ash with 20% water added. After accelerated carbonation, the C and O contents increased, indicating CO(2) capture in the fly ash; CO(2) combines with Ca(OH)(2) to form CaCO(3), which increased the CaCO(3) content from 12.5 to 54.3%. The leaching of Pb markedly decreased from 24.48 to 0.111 mg/L.
Jiang
Jian-guo
JG
Department of Environmental Science and Engineering, Tsinghua University, Beijing, PR China. jianguoj@mail.tsinghua.edu.cn
Du
Xue-juan
XJ
Chen
Mao-zhe
MZ
Zhang
Chang
C
D002245:Carbon Dioxide / Q000737:chemistry*; D060729:Coal Ash / Q000737:chemistry*; D017745:Incineration / Q000295:instrumentation*; D012037:Refuse Disposal
D060729:Coal Ash; D002245:Carbon Dioxide