| 钙基CO2吸收剂的循环特性 |
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| 引用本文： | 乔春珍,肖云汉,田文栋,阳绍军. 钙基CO2吸收剂的循环特性[J]. 化工学报, 2006, 57(12): 2953-2958 |
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| 作者姓名： | 乔春珍 肖云汉 田文栋 阳绍军 |
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| 作者单位： | 中国科学院工程热物理研究所,北京,100080;中国科学院研究生院,北京,100081;中国科学院工程热物理研究所,北京,100080 |
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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吸收剂的循环特性进行了实验研究，考察了煅烧温度和碳酸化（吸收）温度对吸收剂最大转化率的影响，比较了常压煅烧-碳酸化（CC）过程和煅烧-水合-碳酸化（CHC）过程中吸收剂的最大吸收能力，并就添加剂对吸收剂循环性能的影响进行了实验研究.结果表明，随着循环次数的增加，吸收剂的吸收能力明显下降，未经处理的吸收剂，循环10次后，其吸收能力基本都下降到20％左右;温和的煅烧温度和较高的吸收温度下，吸收剂的最大转化率比较高;CC过程中吸收剂的最大转化率明显低于CHC过程;添加了氯化钠和碳酸钠的吸收剂的吸收能力急剧下降，但循环性能稳定;多次循环后对吸收剂进行再活化，可使其活性恢复到初始的95％.
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| 关 键 词： | 制氢 CO2吸收剂 吸收容量 循环性能 |
| 文章编号： | 0438-1157（2006）12-2953-06 |
| 收稿时间： | 2005-10-28 |
| 修稿时间： | 2005-10-282006-03-13 |
Repetitive calcination-carbonation capability of Ca-based CO2 absorbent |
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| QIAO Chunzhen,XIAO Yunhan,TIAN Wendong,YANG Shaojun. Repetitive calcination-carbonation capability of Ca-based CO2 absorbent[J]. Journal of Chemical Industry and Engineering(China), 2006, 57(12): 2953-2958 |
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| Authors: | QIAO Chunzhen XIAO Yunhan TIAN Wendong YANG Shaojun |
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| Affiliation: | 1. Institute of Engineering Thermo physics, Chinese Academy of Sciences, Bei j ing 100080, China;2. Graduate School of Chinese Academy of Sciences, Beijing 100081, China |
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| Abstract: | The repetitive calcination-carbonation capability of Ca-based absorbent was investigated by using a laboratory-scale vertical-tube reactor.The effect of temperatures of calcination and carbonation on the decline of absorbency was studied，and the maximal capture capability of the calcination-carbonation（CC）process and the calcination-hydration-carbonation（CHC）process was compared.The experiment on the absorbents saturated with additive was also carried out.The CO2 capture capacity of the absorbents decreased obviously with the number of cycles,and the CO2 capture capacity for the absorbents without any treatment declined to about 20% after 10 cycles.For example，the capture capacity declined to 20.0% from 73.4% after 10 cycles at 900℃ for calcination and 650℃ for carbonation.A mild calcination temperature and a higher carbonation temperature favored the process and the maximal capture capability could be higher.The maximal conversion ratio of absorbents for the CC process was obviously lower than that of the CHC process.The capture capacity of absorbents added with NaCl and Na2CO3 severely decreased，but the repetitive capability was steady.Regeneration treatment after multiple cycles could make the reactivity of absorbents reach 95% of first carbonation. |
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| Keywords: | hydrogen production CO2 absorbent capture capacity repetitive capability |
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