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Title: |
The Thermogravimeteric Analysis on Carbonation Characteristics of CaO-Based Sorbents |
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Source: |
The Second China Energy Scientist Forum (CESF 2010 E-BOOK)
(pp 235-240)
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Author(s): |
Hongwei Chen, Institute of Power Engineering, North China Electric Power University, Baoding, Heibei Prov. ;
Jin Yan, Institute of Power Engineering, North China Electric Power University, Baoding, Heibei Prov. ;
Riguang Wei, Institute of Power Engineering, North China Electric Power University, Baoding, Heibei Prov. ;
Jianqiang Gao, Institute of Power Engineering, North China Electric Power University, Baoding, Heibei Prov. ;
Xingzhang Huang, Department of Power Engineering, Shenyang Engineering Institute, Shenyang, Liaoning Prov. |
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Abstract: |
This study has not only investigated the effect of sorbents kind on the proceed of carbonation by advancing the TGA experiment for three different sorbents including CaCO3, limestone and dolomite, but also examined the loss of limestone activity caused by particle size distribution (80-180 mesh, 180-230 mesh, 230-300 mesh, 300-400 mesh), calcination temperature (750℃, 850℃, 950℃, 1050℃), calcination duration (20min, 60min, 120min) and the CO2 content in calcination gas phase(0%, 15%, 25%, 35%). The TGA experiments results demonstrate that: the strong influence of sorbent selectivity on carbonation conversion rate, specially, dolomite has gained the maximum; the optimum particle size distribution of limestone sample is 230-300 mesh; the loss of particle surface area induced by sorbent particle sintering as a primary element of inhabiting the absorption of CO2 become more pronounced at either higher calcination temperature or longer standing of calcination; and the presence of CO2 in the calcination gas gets forward the particle sintering so as to affecting the performence of sorbent particle at carbonation process.
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