| 溴改性金属有机骨架的合成及其对单质汞吸附 |
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| 引用本文： | 张笑,沈伯雄,池桂龙,朱少文,王泽怿.溴改性金属有机骨架的合成及其对单质汞吸附[J].化工学报,2016,67(6):2380-2385. |
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| 作者姓名： | 张笑 沈伯雄 池桂龙 朱少文 王泽怿 |
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| 作者单位： | 1. 南开大学环境科学与工程学院, 天津 300071;
2. 河北工业大学能源与环境学院, 天津 300401 |
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| 基金项目： | 国家自然科学基金项目(51541602)。 |
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| 摘 要： | 采用溶剂热法制备了溴改性的金属有机骨架(metal organic framework,MOF),通过模拟烟气动态吸附方法对材料单质汞(Hg0)吸附性能进行研究。利用X射线衍射(XRD)、X射线光电子能谱(XPS)、综合吸附仪对晶体结构、形貌和组分进行表征。结果表明改性后晶体结构不变,比表面积、孔容下降,溴以共价键固定在材料中。改性前和改性后材料对Hg0的吸附效率都有随温度升高而增加趋势。模拟烟气反应床吸附实验证明240℃条件下,溴改性MOF10h内吸附效率高于95%,同等实验条件下,非改性MOF以及传统活性炭吸附剂吸附汞5h后效率低于75%。
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| 关 键 词： | 金属有机骨架载体 溴改性 吸附 单质汞 烟道气 |
| 收稿时间： | 2015-11-18 |
| 修稿时间： | 2016-03-18 |
Preparation of bromine modified metal-organic frameworks for element mercury adsorption |
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| ZHANG Xiao,SHEN Boxiong,CHI Guilong,ZHU Shaowen,WANG Zeyi.Preparation of bromine modified metal-organic frameworks for element mercury adsorption[J].Journal of Chemical Industry and Engineering(China),2016,67(6):2380-2385. |
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| Authors: | ZHANG Xiao SHEN Boxiong CHI Guilong ZHU Shaowen WANG Zeyi |
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| Affiliation: | 1. College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;
2. School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China |
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| Abstract: | Bromine modified metal organic framework (MOF) was synthesized by solvothermal method for element mercury (Hg0) adsorption. The crystal structure, chemical and texture properties of the modified MOF were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N2 adsorption. Covalent bromine was detected on the surface of the modified MOF and the modification process resulted in a lower specific surface area and total pore volume than those of unmodified MOF. Hg0 removal efficiencies increased with temperature for both modified MOF and un-modified MOF sorbent. In the dynamic adsorption experiments, which were conducted trying to mimic the flue gas condition, the bromine modified MOF showed a high Hg0 removal efficiency of above 95% for 10 h at 240℃, while the efficiency dropped to 75% within 5 h for both unmodified MOF and traditional active carbon sorbent. |
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| Keywords: | metal-organic frameworks support bromine modification absorption elemental mercury flue gas |
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