Kinetics of NOx Absorption into (NH4)2SO3 Solution in an Ammonia-Based Wet Flue Gas Desulfurization Process
Kinetics of NOx Absorption into (NH4)2SO3 Solution in an Ammonia-Based Wet Flue Gas Desulfurization Process
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DOI：
10.1021/ef101137k
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发表时间：
2010-10
期刊：
影响因子：
5.3
通讯作者：
Xiang Gao;Zhengwei Du;Honglei Ding;Zu-liang Wu;Hao Lu;Zhong-yang Luo;K. Cen
中科院分区：
文献类型：
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作者：
Xiang Gao;Zhengwei Du;Honglei Ding;Zu-liang Wu;Hao Lu;Zhong-yang Luo;K. Cen
在双搅拌反应器中研究了氨基湿法烟气脱硫工艺的主要成分（NH 4）2SO 3溶液吸收NOx的传质和动力学。在实验条件下，由于（NH 4）2SO 3浓度高于0.05 mol/L，因此NOx与没有O2共存的（NH 4）2SO 3溶液之间的气液反应主要由气膜控制。在这种情况下，发现NOx的吸收率相对于（NH 4）2SO 3浓度为零级。入口分压和氧化度（Φ = NO2/NOx）对NOx的吸收率有明显影响。本研究采用简化的数学计算模型对吸收过程进行模拟。实验结果表明，NOx（NO_2 ~* 或NO ~*）与（NH_4）_2SO_3的气相反应级数及反应速率常数都是氧化度的函数。
The mass transfer and kinetics of NOx absorption into (NH4)2SO3 solution, the main compound of an ammonia-based wet flue gas desulfurization process, have been investigated in a double-stirred reactor. Under the experimental conditions, the gas−liquid reaction between NOx and the (NH4)2SO3 solution without O2 coexisting is controlled mainly by the gas film because the (NH4)2SO3 concentration is higher than 0.05 mol/L. In this case, the absorption rate of NOx is found to be zero-order with respect to the (NH4)2SO3 concentration. The inlet partial pressure and the oxidation degree (Φ = NO2/NOx) have an apparent effect on the absorption rate of NOx. In this research, a simplified mathematical calculated model is applied to the simulation of the absorption process. The experimental results demonstrate that the orders of the reaction with respect to the concentration of NOx (NO2* or NO*) in the gas phase and the reaction rate constants of NOx (NO2* or NO*) with (NH4)2SO3 are all a function of the oxidation deg...