| 膨润土-壳聚糖及其改性吸附剂脱除燃烧烟气中Hg0的性能研究 |
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| 引用本文： | 张安超,孙路石,向军,胡松,付鹏,苏胜,周英彪.膨润土-壳聚糖及其改性吸附剂脱除燃烧烟气中Hg0的性能研究[J].燃料化学学报,2009,37(4):489-495. |
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| 作者姓名： | 张安超 孙路石 向军 胡松 付鹏 苏胜 周英彪 |
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| 作者单位： | State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划 |
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| 摘 要： | 应用VM3000在线测汞仪作为检测手段，在固定床实验台架上，以改性膨润土 壳聚糖为吸附剂进行脱汞(Hg0)实验研究。采用N2吸附/脱附、扫描电镜(SEM)和傅里叶变换红外光谱(FT-IR)等分析仪对吸附剂进行表征。分析发现改性后吸附剂的孔隙和比表面积降低；碘离子进入了膨润土的内部，碘、硫酸和壳聚糖中的氨基发生了化学反应。脱汞实验表明，负载壳聚糖的膨润土吸附剂表现出较膨润土差的脱汞效果，证明膨润土负载壳聚糖脱除气态中单质汞的机理和液相中二价汞的机理不同。经碘改性后，各吸附剂均可不同程度地提高其脱汞效率，且以碘改性膨润土的脱汞效果最好；碘改性吸附剂中添加适量的硫酸后，膨润土负载壳聚糖吸附剂的脱汞效率从85%提高至100%，因与膨润土负载壳聚糖不同的物理化学特性，碘和硫酸改性的膨润土的脱汞效率则降低。
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| 关 键 词： | 膨润土 壳聚糖 吸附剂 脱汞 效率 |
| 收稿时间： | 2008-11-19 |
| 修稿时间： | 2009-03-03 |
Removal of elemental mercury from coal combustion flue gas by bentonite-chitosan and their modifier |
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| ZHANG An-chao,SUN Lu-shi,XIANG Jun,HU Song,FU Peng,SU Sheng,ZHOU Ying-biao.Removal of elemental mercury from coal combustion flue gas by bentonite-chitosan and their modifier[J].Journal of Fuel Chemistry and Technology,2009,37(4):489-495. |
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| Authors: | ZHANG An-chao SUN Lu-shi XIANG Jun HU Song FU Peng SU Sheng ZHOU Ying-biao |
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| Institution: | State Key Laboratory of Coal Combustion;Huazhong University of Science and Technology;Wuhan 430074;China |
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| Abstract: | Adsorption experiments of vapor-phase elemental mercury were carried out by using modified bentonite-chitosan in a laboratory-scale fixed-bed reactor.VM3000 online mercury analyzer was applied to detect the inlet and outlet mercury(Hg0) concentrations.The characterizations of the sorbents were analyzed using the method of nitrogen(N2) adsorption/desorption,scanning electron microscope(SEM) and Fourier transform infra-red spectroscopy(FT-IR),etc..It was observed that the porosity and specific surface area de... |
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| Keywords: | bentonite chitosan sorbent mercury capture efficiency |
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