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首页> 外文期刊>Catalysis Today >Plasma-catalytic decomposition of nitrous oxide over gamma-alumina-supported metal oxides
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Plasma-catalytic decomposition of nitrous oxide over gamma-alumina-supported metal oxides

机译：γ-氧化铝载体金属氧化物上氧化二氮氧化亚乙腈的等离子体催化分解

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摘要

This work investigated the decomposition of dilute N2O from gas streams with various oxygen contents by using a plasma-catalytic process over metal oxide catalysts supported on gamma-Al2O3. Among the metals explored (Ru, Co, Cu, V, etc.), Ru was found to be the best catalyst for the decomposition of N2O in a plasma-catalytic reactor, and most of the experiments were conducted with alumina-supported Ru. The effects of applied voltage, reaction temperature, O-2 content, gas flow rate and initial N2O content on the decomposition efficiency and byproducts formation were examined. Compared to the catalyst-alone case, the presence of plasma enhanced the decomposition efficiency by 30-50%, depending on the operating condition. The increase in the oxygen content from 0 to 20% largely decreased the catalytic decomposition efficiency, whereas in the presence of plasma N2O could be successfully decomposed even at 20% O-2 content. The decomposition efficiency was not a strong function of the initial N2O concentration in the range of 225-1800 ppm, exhibiting pseudo first-order reaction kinetics. Without O-2, there were negligible byproducts, but in the presence of O-2, NO and NO2 were formed mainly due to the plasma-induced reactions between background molecules such as N-2 and O-2. The results obtained in this work showed the feasibility of plasma-catalytic process for the abatement of N2O.
机译：通过使用在γ-Al2O3上负载的金属氧化物催化剂上使用等离子体催化工艺，研究了通过使用各种氧气含量的各种氧气含量的稀释N 2 O的分解。在探索的金属中（Ru，Co，Cu，V等）中，发现Ru被发现是在等离子体催化反应器中分解N2O的最佳催化剂，并且大多数实验用氧化铝负载的Ru进行。研究了施加电压，反应温度，O-2含量，气体流速和初始N2O含量对分解效率和副产物形成的影响。与催化剂单独的情况相比，取决于操作条件，血浆的存在增强了30-50％的分解效率。氧气含量的增加从0〜20％的增加很大程度上降低了催化分解效率，而在血浆N 2 O存在下，即使在20％O-2含量下也可以成功地分解。分解效率不是初始N2O浓度在225-1800ppm的初始功能的强函数，表现出伪一阶反应动力学。没有O-2，副产品可忽略不计，但在O-2存在下，没有形成NO和NO 2，主要是由于诸如N-2和O-2等血浆诱导的等离子体诱导的反应。本作作品中获得的结果表明，血浆催化过程的可行性催化加工N2O的削减。

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