Hueso José L, Gonzalez-Elipe Agustín R, Cotrino José, Caballero Alfonso
Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla), Avda Américo Vespucio 49, 41092 Sevilla, Spain.
J Phys Chem A. 2007 Feb 15;111(6):1057-65. doi: 10.1021/jp063315v.
In this paper, continuing previous work, we report on experiments carried out to investigate the removal of NO from simulated flue gas in nonthermal plasmas. The plasma-induced decomposition of small concentrations of NO in N2 used as the carrier gas and O2 and CH4 as minority components has been studied in a surface wave discharge induced with a surfatron launcher. The reaction products and efficiency have been monitored by mass spectrometry as a function of the composition of the mixture. NO is effectively decomposed into N2 and O2 even in the presence of O2, provided always that enough CH4 is also present in the mixture. Other majority products of the plasma reactions under these conditions are NH3, CO, and H2. In the absence of O2, decomposition of NO also occurs, although in that case HCN accompanies the other reaction products as a majority component. The plasma for the different reaction mixtures has been characterized by optical emission spectroscopy. Intermediate excited species of NO*, C*, CN*, NH*, and CH* have been monitored depending on the gas mixture. The type of species detected and their evolution with the gas composition are in agreement with the reaction products detected in each case. The observations by mass spectrometry and optical emission spectroscopy are in agreement with the kinetic reaction models available in literature for simple plasma reactions in simple reaction mixtures.
在本文中，我们延续之前的工作，报告了为研究非热等离子体中模拟烟道气中NO的去除而进行的实验。在由表面波发射器引发的表面波放电中，研究了以N2作为载气、O2和CH4作为少量成分时，少量NO在等离子体中的分解情况。通过质谱监测反应产物和效率，作为混合物组成的函数。即使存在O2，只要混合物中也始终存在足够的CH4，NO就能有效地分解为N2和O2。在这些条件下，等离子体反应的其他主要产物是NH3、CO和H2。在没有O2的情况下，NO也会发生分解，不过在那种情况下，HCN会作为主要成分伴随其他反应产物出现。通过发射光谱对不同反应混合物的等离子体进行了表征。根据气体混合物监测了NO*、C*、CN*、NH和CH等中间激发态物种。检测到的物种类型及其随气体组成的演变与每种情况下检测到的反应产物一致。质谱和发射光谱的观测结果与文献中关于简单反应混合物中简单等离子体反应的动力学反应模型一致。
