Coke deposition is one of the key issues in the dry reforming of methane on Ni catalysts. In the present work, we investigate the effect of potassium addition for suppressing carbon deposition in the Dry Reforming of Methane. The results obtained demonstrated that potassium contents above 3 wt% promote carbon gasification, favouring both Reverse Water Gas Shift and Boudouard reaction. Strong basic Mg-O-K sites are responsible for these reactions allowing the suppression of carbon deposits and allowing the stability of the catalyst.

中文翻译：

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钾负载量对甲烷CO2重整Ni/MgAl2O4催化剂基本性能的影响

焦炭沉积是甲烷在镍催化剂上干重整的关键问题之一。在目前的工作中，我们研究了钾添加对抑制甲烷干法重整中碳沉积的影响。获得的结果表明，高于 3 wt% 的钾含量促进碳气化，有利于反向水煤气变换和 Boudouard 反应。强碱性 Mg-OK 位点负责这些反应，从而抑制积碳并确保催化剂的稳定性。