Study Mercury Transformation and Emission by Using Homogeneous Hg Oxidation Mechanism

• Main Authors: Pin-Chou Yang, 楊彬洲
• Other Authors: Chieh Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/34005320676799188578

碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 98 === The emission of mercury by waste incinerators and coal-fired power plants were the main parts from anthropogenic activities. The particulate bound mercury (HgP) and oxidized mercury (Hg2+) were usually trapped by ash collection devices. Conversely, elemental mercury (Hg0) was difficulted to capture because of its non-reactivity. The removal of mercury was enhanced when Hg0 was converted to its oxidized form. This research utilized Chemkin Model to simulate Widmer and Xu mercury oxidation mechanisms to realize the effects of HCl and Cl2 affecting the mercury oxidation. The predicted results were as followings: (1) The simulation result was quite consistency between coal-fired power plant and incinerator. (2) Hg0 fully transformed into its oxidized form near 800°K with steadily consumed and transformed rate. (3) The intermediate species, HgO and HgCl, synchronously grew and then transformed fully between 500~820°K and the maximum concentration occurred at 726°K. (4) Hg0 totally transformed into HgCl2 took place at 820°K. (5) The important effect of the intermediate species HgO which proposed by Xu could not be observed obviously in this research.