In this study, we prepared a new-type Ce-Fe impregnated activated carbon (AC) catalyst for the catalytic oxidation of H₂S to S at room temperature. Characterization of the Ce-Fe/AC catalysts and the corresponding catalytic activity for H₂S removal were analyzed and evaluated. The Ce impregnation not only significantly increases catalytic activity but also decreases O₂ demand for H₂S removal due to the oxidation of Fe²⁺ to Fe³⁺ improved by the redox couple Ce⁴⁺/Ce³⁺. The Ce incorporation significantly improved on sulfur capacity and breakthrough time. The breakthrough time and sulfur capacity of the AC supported Ce-Fe catalyst tested under a relative humidity of 80% and 10% O₂ atmosphere at room temperature can reach to 71 h and 820 mg S/g cat, respectively, being much higher than that of the alkaline impregnated AC. It was found that the formed sulfur mainly deposited inside the pore of the AC, but some also formed on the surface of the AC. The activity enhanced by impregnating Ce mainly arises from the increase of chemical potential and the reduction of surface contaminants.

在这项研究中，我们制备了一种新型的Ce-Fe浸渍活性炭（AC）催化剂，用于在室温下将H ₂ S催化氧化为S。分析和评估了Ce-Fe / AC催化剂的表征以及相应的H ₂ S去除催化活性。Ce的浸渍不仅显着提高了催化活性，而且由于氧化还原对Ce ⁴⁺ / Ce ³⁺对Fe ²⁺氧化为Fe ³⁺的氧化作用，还降低了O ₂对H ₂ S去除的需求。。Ce的掺入显着提高了硫容量和突破时间。在室温，80％和10％O ₂的相对湿度下测试的AC负载Ce-Fe催化剂的突破时间和硫容量分别达到71 h和820 mg S / g cat，远高于碱性浸渍的AC。发现形成的硫主要沉积在AC的孔内部，但是一些硫也形成在AC的表面上。通过浸渍Ce增强的活性主要来自化学势的增加和表面污染物的减少。