Simultaneous removal of SO2 and NOx by wet scrubbing using urea solution
Simultaneous removal of SO2 and NOx by wet scrubbing using urea solution
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DOI：
10.1016/j.cej.2010.12.030
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发表时间：
2011-03-15
影响因子：
15.1
通讯作者：
Chen, Zhihang
中科院分区：
文献类型：
--
作者：
Fang, Ping;Cen, Chaoping;Chen, Zhihang
实验在连续模式下的逆流填料塔中进行，以研究尿素溶液对氮氧化物（NOx）和二氧化硫（SO2）的吸收。在二氧化硫去除效率较高的基础上，着重测量了不同实验条件下氮氧化物的去除效率。通过实验研究了尿素浓度、温度、初始pH值、氮氧化物氧化程度、二氧化硫浓度以及添加剂等各种影响因素对氮氧化物去除效率的影响，并确定了最佳条件。对反应产物进行了分析，推导了尿素溶液同时脱硫脱硝的反应机理和总化学反应方程式。通过热力学方法计算了摩尔反应焓、摩尔生成吉布斯函数和化学反应平衡常数。计算结果表明，同时脱硫脱硝是可行的，去除效率几乎达到100%。版权归英国皇家所有（C）2010，由爱思唯尔出版集团出版。保留所有权利。
The experiments were performed in a countercurrent packed column in a continuous mode to study the absorption of NOx and SO2 in urea solutions. On the basis of high SO2 removal efficiency, the NOx removal efficiencies under various experimental conditions were emphatically measured. The various influencing factors, such as urea concentration, temperature, initial pH value, oxidation degree of nitrogen oxides, SO2 concentration and additive on removal efficiencies of NOx were studied experimentally, and the optimal conditions were established. The reaction products were analyzed, and reaction mechanism and total chemical reaction equations for simultaneous desulfurization and denitration using urea solution were deduced. Molar reaction enthalpy, molar formation Gibbs function and chemical reaction equilibrium constant were calculated by thermodynamic methods. The calculation results show that the simultaneous desulfurization and denitration are available, and the removal efficiencies are 100% nearly. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.