NO2- adsorption onto denitration catalysts
NO2- adsorption onto denitration catalysts
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DOI：
10.1016/j.apcata.2009.04.045
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发表时间：
2009-07-01
影响因子：
5.5
通讯作者：
Balint, Ioan
中科院分区：
文献类型：
--
作者：
Miyazaki, Akane;Asakawa, Toru;Balint, Ioan
通常以NO-3（-）、NO 2-和NH 4+离子的浓度来评价加氢催化剂的性能。催化转化率通常由反应溶液中NO3-和NO2-的减少来计算。在这项研究中，进行了间歇实验，通过接触NO2-与Pt/Al 2 O3在存在或不存在的H-2流。即使在不存在H-2的情况下，反应溶液中显著量的NO2-也消失，即，在不发生还原的条件下。这种现象可以通过NO2-吸附到Al 2 O3上来解释。NO2-的平衡吸附量随Pt粒子数的增加呈线性下降。在评价催化剂的性能时，应考虑NO 2-在Al 2 O3上的吸附。此外，利用Al_2O_3对NO_2 ~-的高吸附能力，可以实现其作为清除剂去除废水中NO_2 ~-离子的潜力。(C)2009 Elsevier B. V.保留所有权利，
The performance of denitration catalysts is usually evaluated according to the concentrations of No-3(-), NO2- and NH4+ ions. Catalytic conversion is conventionally calculated from the decrease of NO3- and NO2- in the reaction solution. In this study, batch experiments were performed by contacting NO2- with Pt/Al2O3 under the presence or absence of H-2 flow. Significant amounts of NO2- in the reaction solution disappeared even in the absence of H-2, i.e., under conditions where reduction did not occur. This phenomenon is explained by NO2- adsorption onto Al2O3. The equilibrium amount of adsorbed NO2- showed a linear decrease with the increase of Pt particles. The adsorption of NO2- onto Al2O3 should be considered when the performance of denitration catalysts is evaluated. In addition, utilizing the high adsorption capacity of Al2O3 for NO2- may realize its potential as a scavenger for the removal of NO2- ions in waste water. (C) 2009 Elsevier B.V. All rights reserved,