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Heterogeneous reduction of nitric oxide on synthetic coal chars

机译：一氧化氮在合成煤焦上的异相还原

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Model compounds, with a controlled heteroatoms content and well-defined functionalities, were used to study the release of nitrogen compounds from char combustion. In the present work, the mechanisms involved in NO-char heterogeneous reduction were studied with a synthetic coal (SC) char as carbon source. Another synthetic char (SN) without any nitrogen in its composition was also employed in these studies. Temperature programmed reduction (TPR) tests with a gas mixture of 400 ppm NO in argon and with isotopically labelled nitric oxide, ~(15)NO (500 ppm ~(13)NO in argon), were carried out. The gases produced were quantitatively determined by means of MS and FTIR analysers. Under the conditions of this work the main products of the NO-C reaction were found to be N_2 and CO_2. The main path of reaction involves the formation of surface nitrogen compounds that afterwards react with nitrogen from the reactive gas to form N_2. It was observed that fuel-N also participates in the overall heterogeneous reduction reaction, although to a lesser extent.
机译：具有受控杂原子含量和明确定义的功能的模型化合物用于研究炭燃烧中氮化合物的释放。在目前的工作中，以合成煤（SC）炭为碳源研究了NO炭异质还原的机理。这些研究中还使用了另一种合成炭（SN），其组成中没有任何氮。使用氩气中400 ppm NO的气体混合物和同位素标记的一氧化氮（〜15）NO（氩气中500 ppm〜（13）NO）进行程序升温还原（TPR）测试。通过MS和FTIR分析仪定量测定产生的气体。在这项工作的条件下，发现NO-C反应的主要产物是N_2和CO_2。反应的主要路径包括表面氮化合物的形成，然后与反应性气体中的氮反应形成N_2。观察到燃料-N也参与整个非均相还原反应，尽管程度较小。

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