低温等离子体对Hg^0氧化效果研究

RESEARCH ON Hg^0 OXIDATION EFFECT BY PULSE CORONA INDUCED PLASM A CHEMICAL PROCESS

汞具有挥发性、毒性及远距离迁移性,已被很多国际机构列为优先污染物。如何实现Hg^0的深度氧化是实现大气汞成功脱除的技术关键。等离子体作为物质的第四态,所产生的强氧化氛围,可以高效实现Hg^0到Hg^(2+)的转化,而且低温等离子处理系统具有工艺简单、可协同控制多种污染物、去除效率高、占地面积小、操作简单等特点,是目前在污染物控制技术领域的研究热点。主要介绍了低温等离子体技术的两种放电形式、反应器类型,重点研究了等离子体电源、烟气中各种成分(O_2、H_2O、HCl等)对等离子体氧化Hg^0的影响,并简要展望该技术的发展方向。

Mercury has characteristics of volatile,biological toxicity and long distance migration,which is limited as priority pollutants by international conventions. In recent years,how to realize the deep oxidation of Hg0 is the key problem in thoroughly removal of mercury successfully. Non-thermal plasma,as the fourth state material,can efficiently transform Hg0 to Hg2＋because of the strong oxidation. Moreover,the other advantages,such as simple process,cooperative control of several kinds of pollutants and small floor area,high removal efficiency,and simple operation,made it a hot research topic in pollution control technology field. This paper mainly introduces the discharge form,the type of reactor,the effect of gas components（ O2,H2O,HCl,etc.） on the efficiency of pollution removal by non-thermal plasma,and then put forward to the development direction of this technology.