富H2/CO2气氛下CuO-NiO/CeO2催化CO-PROX性能的研究

Study on the catalytic performance of CO-PROX catalyzed by CuO-NiO/CeO2 in H2/CO2 rich atmosphere

    摘要
  • 摘要: 采用分步浸渍法制备CuO-NiO/CeO2催化剂，通过XRD、BET、H2-TPR、Raman和XPS手段对催化剂进行表征，探究NiO-CeO2前驱体焙烧温度对催化剂物化性质及富H2/CO2气氛下CO选择性氧化性能的影响。结果表明，前驱体焙烧温度主要影响催化剂的还原性能和氧空位的含量。当焙烧温度为500 ℃时，催化剂中氧空位的含量较高，其催化性能较好。在反应温度为130 ℃，氧过量系数为1.2，空速为20266 mL/(g·h)时，CO转化率为95.9%，CO氧化选择性为86.3%。

     

    Abstract: The CuO-NiO/CeO2 catalyst was prepared by step impregnation method. The catalyst was characterized by XRD, BET, H2-TPR, Raman and XPS, and the effects of the calcination temperature of NiO-CeO2 precursor on the physicochemical properties of the catalyst and the selective oxidation of CO in H2/CO2 rich atmosphere were investigated. The results showed that the precursor calcination temperature mainly affected the reduction performance and oxygen vacancy content of the catalyst. When the calcination temperature is 500 ℃, the content of oxygen vacancy in the catalyst is higher, and the catalytic performance is better. When the reaction temperature is 130 ℃, the oxygen excess coefficient is 1.2, and the air speed is 20266 mL/(g·h), the CO conversion rate is 95.9%, and the CO oxidation selectivity is 86.3%.

     

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