期刊
FUEL
卷 239, 期 -, 页码 579-586出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2018.11.065
关键词
Elemental mercury; Silver; Graphene; Adsorption; Flue gas
资金
- National Key R&D Program of China [2017YFC0210500]
- National Natural Science Foundation of China [51508525]
- Key Research and Development Program of Ningxia Hui Autonomous Region [2016KJHM31]
- Zhengzhou University of Light Industry [2015BSJJ001]
Ag nano-particles (NPs) with high dispersion possess the capacity for elemental mercury (Hg-0) removal in low temperature. To further enhance its thermo-stability and electron transfer ability, Ag-Fe3O4@rGO ternary magnetic composite was synthesized for gaseous Hg-0 capture. Results indicated that such composite has a Hg-0 removal performance with higher than 92% removal efficiency at 100 degrees C. The ternary composite has a higher Hg-0 removal performance than that of pure rGO and Ag-Fe3O4@rGO. The physical-chemical characterization results indicated that Ag nano-particles in-situ grow on the surface of Ag-Fe3O4@rGO support. The large surface area of rGO supply efficient reaction room for Hg and Ag atoms. Ag-Hg amalgam is ascribed to the mercury uptake mechanism. The spent materials can be regenerated by a simple thermal-desorption method. In addition, this magnetic material provide an opportunity that can be separated from fly ashes when used in real flue gas.
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