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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Catalytic partial oxidation of methane to synthesis gas over a ruthenium catalyst: the role of the oxidation state
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Catalytic partial oxidation of methane to synthesis gas over a ruthenium catalyst: the role of the oxidation state

机译：钌催化剂上甲烷催化部分氧化为合成气的过程：氧化态的作用

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摘要

The catalytic partial oxidation of methane to synthesis gas over ruthenium catalysts was investigated by thermogravimetry coupled with infrared spectroscopy (TGA-FTIR) and in situ X-ray absorption spectroscopy (XAS). It was found that the oxidation state of the catalyst influences the product formation. On oxidized ruthenium sites, carbon dioxide was formed. The reduced catalyst yielded carbon monoxide as a product. The influence of the temperature was also investigated. At temperatures below the ignition point of the reaction, the catalyst was in an oxidized state. At temperatures above the ignition point, the catalyst was reduced. This was also confirmed by the in situ XAS spectroscopy. The results indicate that both a direct reaction mechanism as well as a combustion-reforming mechanism can occur. The importance of knowing the oxidation state of the surface is discussed and a method to determine it under reaction conditions is presented.
机译：通过热重分析，红外光谱（TGA-FTIR）和原位X射线吸收光谱（XAS）研究了钌催化剂上甲烷催化部分氧化为合成气的方法。发现催化剂的氧化态影响产物的形成。在氧化的钌位点上形成了二氧化碳。还原的催化剂产生一氧化碳作为产物。还研究了温度的影响。在低于反应的着火点的温度下，催化剂处于氧化态。在高于着火点的温度下，催化剂被还原。原位XAS光谱也证实了这一点。结果表明，可以同时发生直接反应机理和燃烧重整机理。讨论了了解表面氧化态的重要性，并提出了在反应条件下确定其氧化态的方法。

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