Oxidation and absorption of nitric oxide in a packed tower with sodium hypochlorite aqueous solutions
Oxidation and absorption of nitric oxide in a packed tower with sodium hypochlorite aqueous solutions
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DOI：
10.1002/ep.10075
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发表时间：
2005-10
期刊：
影响因子：
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通讯作者：
Luke Chen;Chung-Hao Hsu;Chen-Lu Yang
中科院分区：
文献类型：
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作者：
Luke Chen;Chung-Hao Hsu;Chen-Lu Yang
研究了次氯酸钠（NaClO）水溶液氧化吸收一氧化氮（NO）的过程，建立了两级化学洗涤法控制NOx的系统。在第二阶段，最实用的吸收NO2的介质是亚硫酸钠水溶液。虽然已经安装了几个两阶段的系统，有重大差距，在发展NaClO水溶液的NO氧化在第一阶段。特别重要的是缺乏关于化学氧化速率的可靠资料。在填料塔中进行了次氯酸钠水溶液氧化NO的中试研究。该研究旨在获得NO氧化转移单元（HTU）的高度并获得填充床洗涤系统的合理操作条件。在pH值为5.3时，NaClO是一种出色的洗涤介质。结果与次氯酸（HClO）作为溶液中的氧化剂一致。结果还表明，液体质量流量是一个次要的参数，影响NO的氧化和吸收的洗涤器。>0.8%的NaClO浓度对于高NO氧化至关重要。© 2005年美国化学工程师协会环境规划，2005年
The oxidation and absorption of nitric oxide (NO) with sodium hypochlorite aqueous (NaClO) solutions were studied to develop a two-stage chemical scrubbing system for NOx control. In the second stage, the most practical medium for NO2 absorption is sodium sulfite aqueous solution. Although a few two-stage systems have been installed, there are major gaps in developing NaClO aqueous solutions for NO oxidation in the first stage. Of particular importance is the lack of reliable information on rates of the chemical oxidation. A pilot-scale research program is initiated to evaluate the oxidation rate of NO with NaClO aqueous solutions in a packed tower. The research is directed toward obtaining the height of a transfer unit (HTU) for NO oxidation and acquiring reasonable operating conditions for the packed-bed scrubbing system. At pH 5.3, NaClO is an excellent scrubbing medium. The results are consistent with hypochlorous acid (HClO) being the oxidizing agent in the solution. The results also indicate that the liquid mass flow rate is a minor parameter that affects the NO oxidation and absorption in the scrubber. A NaClO concentration of >0.8% is crucial for high NO oxidation. © 2005 American Institute of Chemical Engineers Environ Prog, 2005