Removal of Elemental Mercury from Simulated Flue Gas by Combining Non-thermal Plasma with Calcium Oxide
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- 作者：Jun Zhang ; Yufeng Duan ; Weixin Zhao ; Chun Zhu…
- 关键词：Non ; thermal plasma ; Elemental mercury ; Calcium oxide sorbents ; Ozone ; Mercury oxidation
- 刊名：Plasma Chemistry and Plasma Processing
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：36
- 期：2
- 页码：471-485
- 全文大小：1,000 KB
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Yufeng Duan (1)
Weixin Zhao (1)
Chun Zhu (1)
Qiang Zhou (1)
Min She (1)
1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China
2. School of Chemistry and Material Science, Huaibei Normal University, Huaibei, 235000, Anhui Province, China - 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Mechanics
Characterization and Evaluation Materials
Mechanical Engineering
Inorganic Chemistry
Nuclear Physics, Heavy Ions and Hadrons - 出版者：Springer Netherlands
- ISSN：1572-8986
文摘
Mercury emission from coal combustion has been the fourth biggest pollutant in China, following the dusts, SO2 and NOX. The technology of non-thermal plasma has been widely studied for oxidizing gaseous elemental mercury at low temperature. In this paper, a new method of combining non-thermal plasma with calcium oxide was proposed to remove elemental mercury from simulated flue gas. The effects of non-thermal plasma, input energy, combination mode of plasma and calcium oxide on Hg0 removal were investigated in a wire-cylinder non-thermal plasma reactor, whose energy was supplied by a high voltage alternating current power. The peak voltage and energy of the non-thermal plasma were measured by an oscilloscope and a high voltage probe (1000:1). The results showed that most of Hg0 was converted to oxidized mercury in simulated flue gas by non-thermal plasma treatment. The Hg0 removal efficiency of CaO was improved remarkably strengthened by the non-thermal plasma, which was closely related to input energy, and the maximum mercury removal efficiency was about 80 % at an optimal input energy. Through temperature-programmed decomposition and desorption and energy dispersive spectroscopy analysis, the majority of mercury species on CaO surface were Hg2O and HgO3 rather than HgO. Therefore, it can be concluded that O3 plays an important role in Hg0 oxidation under the condition of non-thermal plasma. Keywords Non-thermal plasma Elemental mercury Calcium oxide sorbents Ozone Mercury oxidation