Experimental Investigation on the Kinetics of NO Complex Absorption through FeIIEDTA Solvent in a Double-Stirred Reactor

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• 作者：Qian Du ; Haoyang Zhao ; Leiling Ming ; Jianmin Gao ; Guangbo Zhao ; Shaohua Wu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：April 20, 2011
• 年：2011
• 卷：50
• 期：8
• 页码：4425-4431
• 全文大小：943K
• 年卷期：v.50,no.8(April 20, 2011)
• ISSN：1520-5045

文摘

NO emission is a significant source of pollutant from coal combustion. With the establishment of industry flue gas emission standards, removal of NO has been attracting attention and research globally. In this paper, the denitration process through the use of a Fe^II complex solvent has been studied based on the approach of the wet desulfurization method. The kinetic parameters of the chemical reaction for NO absorption by Fe^II complex have also been deduced to provide theoretical consideration for the feasibility of this process. It is demonstrated that Fe^IIEDTA adsorbs NO efficiently under the conditions investigated, achieving the maximum NO reduction efficiency at a neutral pH value at 50 掳C. The inlet O₂ content in flue gas is a crucial factor affecting the performance of Fe^II complex, the increment in which leads to the oxidation of Fe^II into Fe^III and hence reduces the absorption capability of the sorbent. The coexistence of SO₂ and NO in flue gas decreases the NO removal efficiency by being preferentially adsorbed by the sorbent. However, with the increasing content of SO₂ in flue gas, the solvent鈥檚 capability in absorbing NO is recovered to its original level.