| 包硅改性纳米碳酸钙应用于高温CO2吸附的性能 |
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| 引用本文： | 吴嵘,吴素芳.包硅改性纳米碳酸钙应用于高温CO2吸附的性能[J].化工学报,2006,57(7):1722-1726. |
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| 作者姓名： | 吴嵘 吴素芳 |
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| 作者单位： | 浙江大学材料与化工学院，浙江 杭州 310027 |
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| 基金项目： | 国家留学回国人员科研启动基金 |
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| 摘 要： | 引言 二氧化碳吸附强化制氢(SERP)的原理是将甲烷水蒸气重整反应过程产生的CO2用吸附剂脱除,从而打破化学反应平衡,降低反应平衡常数,使反应温度由800～1000℃降低至500℃左右,使制氢反应条件更温和、能耗更低.该技术的工业可行性研究的关键是甲烷水蒸气重整反应过程中采用的高温CO2的吸附剂的性能研究1].
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| 关 键 词： | 纳米氧化钙 包硅处理 分解温度 高温吸附 吸附容量 循环稳定性 |
| 文章编号： | 0438-1157（2006）07-1722-05 |
| 收稿时间： | 08 3 2005 12:00AM |
| 修稿时间： | 2005-08-032006-02-16 |
Performance of nano-CaCO3 coated with SiO2 on CO2 adsorption at high temperature |
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| WU Rong,WU Sufang.Performance of nano-CaCO3 coated with SiO2 on CO2 adsorption at high temperature[J].Journal of Chemical Industry and Engineering(China),2006,57(7):1722-1726. |
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| Authors: | WU Rong WU Sufang |
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| Affiliation: | College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China |
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| Abstract: | Nano-CaCO3 particles were surface-coated with SiO2 by the sol-gel method and used as the high temperature CO2 adsorption material.CaCO3 samples prepared at 60—90℃ were characterized with TEM, EDS and XRD methods and the initial and final decomposition temperature were determined with TGA.The CO2 adsorption ratio and carbonation-calcination characteristics were evaluated in a φ12 mm fixed bed reactor.The analytical results showed that there was an amorphous SiO2 film formed on the surface of nano-CaCO3,and the atomic ratio of Si to Ca is 1∶39.The initial and final decomposition temperatures were 595—620℃ and 800—820℃ respectively.The maximum CO2 adsorption ratio of SiO2 coated with nano-CaCO3 was 92.1% at 600℃with a 10% increase as compared with the uncoated nano-CaCO3 particles.After 20 cyclic carbonation and calcination runs, CO2 adsorption ratio of the SiO2 coated samples was 63%.The XRD analysis illustrated that the crystal type of nano-CaCO3 had no change after 20 cyclic runs. |
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| Keywords: | nano-calcium oxide silicon coated modification decomposition temperature high temperature adsorption adsorption capacity cyclic stability |
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