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首页> 外文期刊>Journal of industrial and engineering chemistry >NO presence effects on the reduction of N2O by CO over Al-Pd-Co oxide catalyst
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NO presence effects on the reduction of N2O by CO over Al-Pd-Co oxide catalyst

机译：NO存在对Al-Pd-Co氧化物催化剂上CO还原N2O的影响

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摘要

Nitrous oxide (N2O) is known as one of the greenhouse gases of which the emission levels are to be controlled and also an ozone-depleting material in the stratosphere. For more than a last couple of decades, various catalysts have been investigated for the reduction of N2O emission. However, most of those catalysts require reaction temperatures as high as 450 °C even with the use of effective reducing agents. Furthermore, NO, which is usually present with N2O, significantly interferes with the removal efficiency of N2O. Al-Pd-Co oxide catalyst which is a type of mixed metal oxides (MMO) has shown 100% conversion of N2O at temperatures as low as 200 °C using CO. This paper examines the effect of NO on the reduction of N2O with CO over Al-Pd-Co oxide catalyst. The experiments were carried out in the temperature range of 100-500 °C with space velocity of 10,000-50,000 h~(-1). Though the efficiency of N2O reduction is decreased significantly when NO is present, the efficiency increases when sufficient CO is supplied. In this study, the reduction mechanisms of N2O and NO by CO have been confirmed, and it was shown that MMO catalyst can simultaneously remove N2O and NO using CO with high efficiency.
机译：一氧化二氮（N2O）是要控制其排放水平的温室气体之一，也是平流层中的一种消耗臭氧层的材料。在过去的几十年中，已经研究了各种催化剂来减少N2O排放。然而，即使使用有效的还原剂，大多数这些催化剂要求反应温度高达450℃。此外，通常与N2O一起存在的NO会严重干扰N2O的去除效率。作为一种混合金属氧化物（MMO）的Al-Pd-Co氧化物催化剂显示，在低至200°C的温度下，使用CO可以100％转化N2O。本文研究了NO对CO还原N2O的影响。在Al-Pd-Co氧化物催化剂上。实验在100-500°C的温度范围内进行，空速为10,000-50,000 h〜（-1）。尽管当存在NO时，N2O的还原效率会大大降低，但当供应足够的CO时，效率会提高。在这项研究中，已经证实了CO还原N2O和NO的机理，并且表明MMO催化剂可以高效地利用CO同时去除N2O和NO。

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