Efficient Inhibition of N2O during NO Absorption Process Using a CuO and (NH4)2SO3 Mixed Solution,Industrial & Engineering Chemistry Research

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Efficient Inhibition of N2O during NO Absorption Process Using a CuO and (NH4)2SO3 Mixed Solution
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-09-18 , DOI: 10.1021/acs.iecr.8b03307
Yongheng Xiong ₁ , Qin Zhong ₁ , Man Ou ₁ , Wei Cai ₂ , Shipeng Wan ₁ , Yang Yu ₁ , Shule Zhang ₁

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The discovery of effective methods toward nitric oxide (NO) removal by solution is valuable for the cost-effective flue gas control. In this study, it is first reported that nitrous oxide (N₂O) is obviously suppressed by using copper oxide (CuO) combined with (NH₄)₂SO₃ (NS) solution. CuO has been characterized, and the effects of reactants concentration, additives, temperature, pH and powder size on NO absorption process have been evaluated. The selectivity of N₂O can drop from 91.30% to 11.25% under the optimum experimental conditions. Furthermore, based on the method of single-factor analysis, the inhibition of N₂O is identified as the coeffect of NS/CuO. In addition, the pathways of NO removal are divided into two parts—N₂O formation and NO absorption—and its ratio is calculated in the range of 0.29–0.53. Because of the continuous supply of NS from ammonia desulfurization, this study opens the feasibility of simultaneous desulfurization and denitrification.

中文翻译：

CuO和（NH ₄）₂ SO ₃混合溶液在NO吸收过程中对N ₂ O的有效抑制

发现通过溶液去除一氧化氮（NO）的有效方法对于控制烟气成本具有重要意义。在这项研究中，首次报道了将氧化铜（CuO）与（NH ₄）₂ SO ₃（NS）溶液结合使用可明显抑制一氧化二氮（N ₂ O）。表征了CuO，并评估了反应物浓度，添加剂，温度，pH和粉末尺寸对NO吸收过程的影响。在最佳实验条件下，N ₂ O的选择性可以从91.30％降至11.25％。此外，基于单因素分析方法，N ₂的抑制作用O被确定为NS / CuO的协同效应。此外，NO去除的途径分为N ₂ O形成和NO吸收两部分，其比值在0.29-0.53范围内计算。由于氨脱硫持续供应NS，这项研究为同时进行脱硫和反硝化提供了可能性。

更新日期：2018-09-19

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