低温等离子体耦合氯化钙模拟烟气脱汞实验研究

发布时间：2018-05-20 20:02

本文选题：低温等离子体 + 介质阻挡放电　；参考：《中国电机工程学报》2016年04期

【摘要】：采用介质阻挡放电低温等离子体(dielectric barrier discharge non-thermal plasma,DBD-NTP)结合氯化钙(Ca Cl_2)吸附剂进行了模拟烟气脱汞实验研究。实验结果表明,Ca Cl_2能够有效的吸附经DBD-NTP氧化的汞化合物,而DBD-NTP中间耦合Ca Cl_2氧化脱汞方式效果更佳,在输入能量为120J/L条件下,汞脱除效率在数分钟内就可达到98%以上;通过对Ca Cl_2吸附的汞化合物采取程序升温脱附法(temperature programmed desorption,TPD)以及能谱分析(energy dispersive spectroscope,EDS),推断汞化合物产物形态为HgC l_2、Hg2O、HgO 3和HgO的混合物;在DBD-NTP中间耦合Ca Cl_2氧化脱汞过程中,除了发生汞的气相氧化反应外,NTP还能够激发Cl元素参与到Hg~0的氧化过程,并且形成的汞氧化物能够提供一定的活性位,通过表面诱导反应进一步促进对Hg~0的氧化作用。
[Abstract]:The experimental study of mercury removal from simulated flue gas by dielectric barrier discharge (DBD) and calcium chloride (CaCl2) adsorbent was carried out. The experimental results show that Ca Cl_2 can effectively adsorb mercuric compounds oxidized by DBD-NTP, while the effect of DBD-NTP intermediate coupling Ca Cl_2 oxidation is better. Under the condition of input energy of 120J/L, the removal efficiency of mercury can reach more than 98% in a few minutes. By temperature programmed desorption of mercury compounds adsorbed by Ca Cl_2 by temperature programmed desorption and energy dispersive spectroscopes, it is inferred that the product of mercury compounds is a mixture of HgC lap2Hg2OHgO 3 and HgO, and in the process of oxidative decarbonization of DBD-NTP coupled with Ca Cl_2, it is concluded that the form of the mercury compounds is a mixture of HgC L2 Hg 2O 3 and HgO, and in the process of oxidative decarbonization of Ca Cl_2 in the middle of DBD-NTP, In addition to the gas phase oxidation of mercury, NTP can also excite Cl elements to participate in the oxidation of Hg~0, and the resulting mercury oxides can provide certain active sites, and further promote the oxidation of Hg~0 through surface induced reactions.
【作者单位】：能源热转换及其控制过程测控教育部重点实验室(东南大学);
【基金】：国家自然科学基金项目(51376046,51576044) 中央高校基本科研业务费专项资金资助江苏省普通高校研究生科研创新计划资助项目(CXZZ13_0093,KYLX_0184,KYLX_0115,KYLX15_0071)~~
【分类号】：X701

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