Experimental study on CO2 capture conditions of a fluidized bed limestone decomposition reactor
Experimental study on CO2 capture conditions of a fluidized bed limestone decomposition reactor
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DOI：
10.1016/j.fuproc.2009.07.011
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发表时间：
2010-08
影响因子：
7.5
通讯作者：
Yin Wang;Shiying Lin;Yoshizo Suzuki
中科院分区：
文献类型：
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作者：
Yin Wang;Shiying Lin;Yoshizo Suzuki
在这项研究中，通过使用连续运行的流化床反应器，研究了在蒸汽稀释气氛（CO2 中含有 20-100% 蒸汽）中捕获 CO2 的石灰石颗粒（0.25-0.50mm）的分解条件。结果表明，石灰石的分解转化率随CO2供气中水蒸气稀释比例的增加而增加。在床温为 920°C 时，无蒸汽稀释时的转化率为 72%，60% 蒸汽稀释时的转化率为 98%。在 850°C 的床温下，100% 蒸汽稀释时，转化率为 99%。蒸汽稀释不仅可以降低石灰石的分解温度，还可以缩短CaCO3接近完全分解所需的停留时间。还测试了产生的 CaO 的水化和碳酸化反应性，结果表明，两种反应性均随着分解石灰石的蒸汽稀释百分比而增加。
In this study, the decomposition conditions of limestone particles (0.25–0.50mm) for CO2capture in a steam dilution atmosphere (20–100% steam in CO2) were investigated by using a continuously operating fluidized bed reactor. The results show that the decomposition conversion of limestone increased with the steam dilution percentage in the CO2supply gas. At a bed temperature of 920°C, the conversions were 72% without steam dilution and 98% with 60% steam dilution. The conversion was 99% with 100% steam dilution at 850°C of the bed temperature. Steam dilution can decrease not only the decomposition temperature of limestone, but also the residence time required for nearly complete decomposition of CaCO3. The hydration and carbonation reactivities of the CaO produced were also tested and the results show that both the reactivities increased with the steam dilution percentage for decomposing limestone.