In this study, Co-based catalysts supported over Ti-Al oxide and promoted with La, Ce, Mg, and K metals were assessed for CO reforming of methane reaction to produce syngas. Titania-alumina mixed oxide supports were prepared using the template-assisted-solvothermal method, and then Co and promotors were co-impregnated over the as-prepared support. Different characterizations of catalysts showed that variation in promotor metal impacts these catalysts' physical and chemical properties. The Ti-Al oxide support possessed the perfect hexagonal morphology. Potassium-promoted catalysts possessed the highest number of basic sites, whereas the La-promoted catalyst possessed the highest number of acidic sites. La promotion improved the Co dispersion, while Mg promotion enhanced the metal support integration. La-promoted catalysts are deactivated because of active metal oxidation and the generation of hard carbon. The carbon was deposited in all catalysts; however, the activity of the Mg-promoted catalyst was unaffected. The intermediate surface basicity and strong metal support interaction improved the Mg-promoted catalyst's stability. The La and Mg-promoted catalysts possessed lower apparent activation energies.

中文翻译：

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Co-MOX/TiO2-Al2O3 (MOX = La、Ce、Mg 和 K) 催化剂上促进剂对甲烷干重整利用 CO2 生产合成气的影响研究

在这项研究中，评估了以 Ti-Al 氧化物为载体并用 La、Ce、Mg 和 K 金属促进的钴基催化剂用于甲烷 CO 重整反应生产合成气的情况。采用模板辅助溶剂热法制备二氧化钛-氧化铝混合氧化物载体，然后将Co和促进剂共浸渍在所制备的载体上。催化剂的不同表征表明助催化剂金属的变化会影响这些催化剂的物理和化学性质。 Ti-Al氧化物载体具有完美的六方形貌。钾促进的催化剂具有最高数量的碱性位点，而La促进的催化剂具有最高数量的酸性位点。 La的促进改善了Co的分散性，而Mg的促进则增强了金属载体的整合。 La-促进的催化剂由于活性金属氧化和硬碳的生成而失活。碳沉积在所有催化剂中；然而，镁促进的催化剂的活性不受影响。中间的表面碱度和强的金属载体相互作用提高了镁促进的催化剂的稳定性。 La 和 Mg 促进的催化剂具有较低的表观活化能。