| NO与Co(NH3)2+6气液反应动力学 |
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| 引用本文： | 龙湘犁,肖文德,袁渭康.NO与Co(NH3)2+6气液反应动力学[J].化工学报,2003,54(9):1264-1268. |
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| 作者姓名： | 龙湘犁 肖文德 袁渭康 |
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| 作者单位： | 华东理工大学联合化学反应工程研究所，上海200237 |
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| 基金项目： | 国家自然科学基金“九五”重点资助项目 (No .2 963 3 0 3 0 )~~ |
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| 摘 要： | 用Co(NH3)2+6的氨水溶液可同时实现NO的氧化和吸收过程.NO 与Co(NH3)2+6气液反应动力学研究表明，NO与Co(NH3)2+6的反应为瞬间反应，当Co(NH3)2+6浓度低于20mmol•L-1时过程为双膜控制，当Co(NH3)2+6浓度大于20mmol•L-1时过程逐渐变为气膜控制.NO的吸收速度随温度的升高而降低，气相中氧的存在有利于NO的吸收，但当氧的含量高于5.2%后再继续增加氧的含量NO吸收速率提高不大.经研究建立了有氧时NO 与Co(NH3)2+6气液反应动力学方程.
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| 关 键 词： | 动力学 吸收 气液反应 一氧化氮 |
| 文章编号： | 0438-1157(2003)09-1264-05 |
| 收稿时间： | 2002-3-19 |
| 修稿时间： | 2002年3月19日 |
KINETICS OF GAS-LIQUID REACTION OF NO WITH Co(NH3)2+6 |
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| LONG Xiangli,XIAO Wende,YUAN Weikang.KINETICS OF GAS-LIQUID REACTION OF NO WITH Co(NH3)2+6[J].Journal of Chemical Industry and Engineering(China),2003,54(9):1264-1268. |
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| Authors: | LONG Xiangli XIAO Wende YUAN Weikang |
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| Abstract: | Oxidation and absorption of nitric oxide can be achieved by using cobalt(Ⅱ) in aqueous ammonia solution. Nitric oxide is oxidized to soluble nitric dioxide in liquid phase. The Co(NH3)2+6 produced by cobalt(Ⅱ) ions complexing with ammonia acts as the catalyst. The oxidant is the oxygen in flue gas. Oxidation and absorption of nitric oxide proceed simultaneously. A stirred vessel with a plane gas-liquid interface was used to measure the chemical absorption rates of nitric oxide into Co(NH3)2+6 solutions. The reaction of NO with Co(NH3)2+6 can be considered as instantaneous. The gas-liquid reaction becomes gas film controlling as Co(NH3)2+6 concentration exceeds 20mmol•L-1. Oxygen in the gas phase is favorable to the absorption of nitric oxide, but the effect is less significant at oxygen concentration above 5.2%. The NO absorption rate decreases with increasing temperature. The kinetic equation of NO absorption into Co(NH3)2+6 solutions in the presence of oxygen is presented. |
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| Keywords: | kinetics absorption gas-liquid reaction nitric oxide |
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