Ni-based catalysts with different promoters, such as Fe, La, Zr, Ce, and Ca, were prepared using the one-step sol–gel method and tested for their performance in the combined reforming of methane using steam and oxygen. The catalysts were characterized by XRD, SEM, TPO, BET, and TPR analysis. The consequences revealed that deposited carbon was lower on the surface of the 10% Ni-3% Fe-MgO·Al₂O₃ catalyst in oxygen-combined CH₄ reforming. The Fe₂O₃-doped sample depicted the highest CH₄ conversion, more than 65%, and showed a higher catalytic stability for O₂ reforming of methane. In addition, introducing steam into the feeds benefited the performance of catalysts due to lower coke formation, and the H₂/CO ratio was changed from 1.5 to 3 at 700 °C. It is concluded that the high catalytic efficiency of the Fe₂O₃-doped sample in combined reforming of methane was associated with its high reducibility and more reduction of NiO species.

中文翻译：

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水蒸气与氧气联合重整制合成气阻结焦催化剂的制备与评价


采用一步溶胶-凝胶法制备了具有不同促进剂（如 Fe、La、Zr、Ce 和 Ca）的镍基催化剂，并测试了其在蒸汽和氧气联合重整甲烷中的性能。通过 XRD、SEM、TPO、BET 和 TPR 分析对催化剂进行了表征。结果表明，10%Ni-3%Fe-MgO·Al ₂ O ₃ 催化剂在氧结合CH ₄ O ₃ 掺杂样品具有最高的 CH ₄ 转化率，超过 65%，并且对 O ₂ /CO比从1.5变为3。结果表明，Fe ₂ O ₃ 掺杂样品在甲烷联合重整中的高催化效率与其高还原性和更多的 NiO 物质还原有关。