Removal of arsenic from flue gas by using NaClO solution
Removal of arsenic from flue gas by using NaClO solution
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DOI：
10.1016/j.cej.2016.10.007
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发表时间：
2017-02
影响因子：
15.1
通讯作者：
Yi Zhao;Wen Qiu;Chunyan Yang;Jianan Wang
中科院分区：
文献类型：
--
作者：
Yi Zhao;Wen Qiu;Chunyan Yang;Jianan Wang
开发了一种廉价的方法，用次氯酸钠溶液从烟道气中除去砷。在自制的鼓泡反应器中，考察了NaClO浓度、溶液初始pH值、反应温度、烟气中O2、CO2、SO2和NO浓度等因素对脱砷效果的影响，得到了最佳实验条件：烟气流速1.0 L/min，NaClO溶液浓度100 mmol/L，0的溶液pH和60 °C的反应温度。平均去除率达到97.5%。产物的HPLC-HG-AFS分析证明主要反应产物为AsO 43 −。结合电极电位分析，提出了As 2 O3与NaClO溶液反应的机理。
An inexpensive process has been developed to remove arsenic from flue gas using NaClO solution. The various influencing factors, such as NaClO concentration, initial solution pH, reaction temperature, concentrations of O2, CO2, SO2and NO in flue gas on the removal of arsenic were investigated experimentally at a self-made bubbling reactor, from which, the optimal experimental conditions were obtained with 1.0 L/min of flue gas flow rate, 100 mmol/L of NaClO solution, 6.0 of the solution pH and 60 °C of reaction temperature. And the average removal efficiency was achieved at about 97.5%. HPLC-HG-AFS analyses of products proved that the main reaction product was AsO43−. Combined with the analysis of the electrode potentials, the mechanism of As2O3reaction with NaClO solution was proposed.