Preparation of bromine modified metal-organic frameworks for element mercury adsorption

ZHANG Xiao; SHEN Boxiong; CHI Guilong; ZHU Shaowen; WANG Zeyi

doi:10.11949/j.issn.0438-1157.20151730

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Preparation of bromine modified metal-organic frameworks for element mercury adsorption

更新时间：2025-11-26

- Preparation of bromine modified metal-organic frameworks for element mercury adsorption
- CIESC Journal Issue 6, Pages: 2380-2385(2016)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151730
  CLC： 511
- Online First：05 June 2016，
  
  Published：05 June 2016
- 稿件说明：
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ZHANG Xiao, SHEN Boxiong, CHI Guilong, et al. Preparation of bromine modified metal-organic frameworks for element mercury adsorption[J]. CIESC Journal, 2016, (6): 2380-2385.
DOI：

ZHANG Xiao, SHEN Boxiong, CHI Guilong, et al. Preparation of bromine modified metal-organic frameworks for element mercury adsorption[J]. CIESC Journal, 2016, (6): 2380-2385. DOI： 10.11949/j.issn.0438-1157.20151730.

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%。

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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