| 燃煤飞灰对锅炉烟道气中Hg0的吸附特性 |
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| 引用本文： | 王立刚,彭苏萍,陈昌和.燃煤飞灰对锅炉烟道气中Hg0的吸附特性[J].环境科学,2003,24(6):59-62. |
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| 作者姓名： | 王立刚 彭苏萍 陈昌和 |
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| 作者单位： | 清华大学热能工程系 北京100084;中国矿业大学资源开发工程系 北京100083;清华大学热能工程系 北京100084 |
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| 基金项目： | 国家杰出青年基金资助项目(50025413) |
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| 摘 要： | 在实验室模拟研究了燃煤飞灰颗粒组分对燃煤烟道气中气相Hg的吸附脱除特性.试验结果表明,Hg吸附量随飞灰烧失量的增长而增大,飞灰中不同类型介质的气相Hg吸附特性差异显著,其中未燃尽炭的Hg吸附性能最强,吸附剂BET比表面积与其Hg吸附量呈正相关关系.载气气相Hg浓度与Hg吸附量成非线性正相关关系,即Hg浓度为5×10-7时的Hg吸附量只有5×10-6的1/2.吸附温度与Hg吸附量呈较显著负相关关系.残炭表面的含氧官能团C=O有利于Hg的氧化和化学吸附.燃煤飞灰炭粒所具有的多孔隙结构和巨大比表面积有利于吸附脱除烟道气中Hg污染物.
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| 关 键 词： | 燃煤飞灰 未燃炭 汞 吸附 |
| 文章编号： | 0250-3301(2003)06-04-0059 |
| 收稿时间： | 2002/11/3 0:00:00 |
| 修稿时间： | 2002年11月3日 |
The Experimental Study to Hg0 Adsorption of Fly Ash in Flue Gas |
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| Wang Ligang,Peng Suping and Chen Changhe.The Experimental Study to Hg0 Adsorption of Fly Ash in Flue Gas[J].Chinese Journal of Environmental Science,2003,24(6):59-62. |
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| Authors: | Wang Ligang Peng Suping and Chen Changhe |
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| Institution: | Department of Thermal Engineering, Tsinghua University, Beijing 100084, China. |
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| Abstract: | Through the simulation experimentation, the Hg adsorption characteristics of fly ash in flue gas were studied carefully in laboratory. From the experiment results it was found that Hg adsorption capacity of different porous medium in fly ash was different obviously. Unburned carbon had higher Hg adsorption capacity. The surface-area of BET sorbent had positive correlation with Hg adsorption capacity. Hg concentration in blend gas had non-linearity relationship with Hg adsorption capacity. Hg adsorption capacity of 5×10-7 Hg concentration was only 1/2 compared to that of 5×10-6. Adsorption temperature had negative correlation with it. CO in unburnt carbon surface was beneficial to oxidation and chemic adsorption of Hg. It was obtained that the porous structure and huge surface-area of the unburned carbon was benefit to the Hg adsorption in flue gas. |
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| Keywords: | fly ash unburned carbon Hg adsorption |
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