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首页> 外文会议>International Conference on Material Science and Environmental Engineering >Absorption of NO into aqueous coal slurry with added Fe~n(EDTA) in the presence of SO_2
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Absorption of NO into aqueous coal slurry with added Fe~n(EDTA) in the presence of SO_2

机译：在SO_2存在下，吸收含入水煤中的水煤浆液，添加Fe〜N（EDTA）

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Comparative experiments were carried out using a bubbling reactor. NO, SO_2,O_2 and N_2 were used to simulate flue gas. The presence of gaseous SO_2 can result in enhanced leaching of coal pyrite producing Fe~(2+), while Fe~(2+) is the desired ion in absorption of NO by Fe~(11) (EDTA) chelate. In this paper the effects of coal on the removal of NO were studied in a process of absorption of NO into aqueous coal slurry with added Fe~(11)(EDTA) in the presence of SO_2. NO removal, nitrogen compounds produced and variations of ferrous iron concentrations were determined. Experiments showed that the absorbed NO was mainly reduced to ammonium. It was deduced that the reducing reagent was coal pyrite. The added coal in Fe~(11)(EDTA) solution could inhibit the decrease of ferrous ion concentration, increase the pH of the solution and therefore increase the removal efficiency of NO. Chemical reactions accompanying Fe~(11) (EDTA) complexed NO reduction were discussed.
机译：使用鼓泡反应器进行比较实验。不，SO_2，O_2和N_2用于模拟烟道气。气态SO_2的存在可能导致煤硫铁矿产生Fe〜（2+）的增强浸出，而Fe〜（2+）是不含Fe〜（EDTA）螯合物的所需离子。在本文中，在SO_2存在下，在吸收含量的水煤浆液中，在含水煤浆液中的吸收过程中研究了煤的影响。不测定不切除，测定产生的氮化合物和亚铁浓度的变化。实验表明，吸收的NO主要还原为铵。推导出还原剂是煤硫铁矿。在Fe〜（11）（EDTA）溶液中添加的煤可以抑制亚铁离子浓度的降低，增加溶液的pH，因此增加了NO的去除效率。伴随Fe〜（11）（EDTA）伴有的化学反应没有讨论了减少。

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