| 钙基CO_2吸收剂循环活性衰减原因初探 |
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| 引用本文： | 乔春珍,王宝利,肖云汉. 钙基CO_2吸收剂循环活性衰减原因初探[J]. 化工学报, 2010, 61(3): 720-724 |
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| 作者姓名： | 乔春珍 王宝利 肖云汉 |
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| 作者单位： | 北方工业大学建筑工程学院;中国科学院工程热物理研究所 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 对钙基CO2吸收剂的循环活性衰减进行了实验研究,考察了随着循环次数的增加,吸收剂的表面形态、吸收剂分子孔径及比表面积等微观结构的变化,分析了钙基CO2吸收剂循环活性衰减的原因。结果表明,随着循环次数的增加,吸收剂晶粒中的片状结构已经完全消失,取而代之的是正方体状的大晶粒,晶粒生长严重,大量空隙被封闭。而由此引起的吸收剂的比表面积的不断减小和孔容积的降低以及孔分布的改变,导致了吸收剂循环活性的衰减,吸收剂的循环转化率降低。
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| 关 键 词： | CO2吸收剂 循环特性 活性衰减 微观结构 |
| 收稿时间： | 2009-08-20 |
| 修稿时间： | 2009-12-7 |
Activity decline of Ca-based CO_2 absorbent in repetitive calcination-carbonation |
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| QIAO Chunzhen,WANG Baoli,XIAO Yunhan. Activity decline of Ca-based CO_2 absorbent in repetitive calcination-carbonation[J]. Journal of Chemical Industry and Engineering(China), 2010, 61(3): 720-724 |
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| Authors: | QIAO Chunzhen WANG Baoli XIAO Yunhan |
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| Abstract: | The carbonation characteristics and the decline of reactivity for recycle Ca-based CO2 absorbent were investigated. The microstructure, pore radius and specific surface area of the absorbent changed with the number of cycles, leading to the decline of the absorbent reactivity. The results show that, the lamellar structure in the absorbent disappears, which changes to bigger cubic crystals, and most apertures were blocked. It reduces the specific surface area and total cumulative volume and changes the distribution of pore radius, and then the reactivity of Ca-based CO2 absorbent and the absorption capability decline as the number of cycles increases. |
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| Keywords: | CO2 absorbent recycle characteristics reactivity decline microstructure |
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