The present work investigates the performance of Re-promoted Nickel-based catalyst supported on calcium oxide for glycerol dry reforming reaction. The catalysts were prepared using wet impregnation method and their catalytic performance was tested in a packed bed reactor with CO₂ to glycerol ratio (CGR) of 1–5, reaction temperature of 600–900 °C and gas hourly specific velocity (GHSV) of 1.44 × 10⁴–7.20 × 10⁴ ml g_cat⁻¹ s⁻¹. The optimum operating temperature for both Ni/CaO and ReNi/CaO is 800 °C, with the GHSV of 3.6 × 10⁴ mL g_cat⁻¹s⁻¹. The optimum CGR for Ni/CaO and ReNi/CaO is 1.0 and 3.0, respectively. At this condition, hydrogen gas is directly produced from glycerol decomposition and indirectly from water-gas-shift reaction. After 2 h at the optimum conditions, 5% ReNi/CaO gives optimal glycerol conversion and hydrogen yield of approximately 61% and 56%, respectively, while in comparison to 15% Ni/CaO, the conversion and yield are 35 and 30%, respectively. Characterization of the spent catalysts showed the existence of whisker carbon from the CO₂ hydrogenation and methanation processes. By comparing to 15% Ni/CaO, the addition of Re increases the acidic sites of the catalyst and enhanced the surface adsorption of OH group of the glycerol. The adsorbed glycerol on the catalyst surface would further react with the adsorbed CO₂ to yield gases products. Thus, the catalytic activity improved significantly.

本工作研究了负载在氧化钙上的重促进镍基催化剂对甘油干重整反应的性能。使用湿浸渍法制备催化剂，并在填充床反应器中测试了它们的催化性能，其中CO ₂与甘油的比率（CGR）为1-5，反应温度为600-900°C，气体小时比速为（GHSV）。 1.44×10 ⁴ –7.20×10 ⁴  ml g_猫^-1  s ^-1。Ni / CaO和Re Ni / CaO的最佳工作温度均为800°C，GHSV为3.6×10 ⁴  mL g _cat ^-1 s ^-1。Ni / CaO和Re的最佳CGRNi / CaO分别为1.0和3.0。在这种条件下，甘油分解直接产生氢气，而水煤气变换反应间接产生氢气。在最佳条件下2小时后，5％的Re Ni / CaO可使甘油的最佳转化率和氢气产率分别约为61％和56％，而与15％的Ni / CaO相比，转化率和产率分别为35％和30％ ， 分别。废催化剂的表征表明，存在来自CO ₂氢化和甲烷化过程的晶须碳。通过与15％的Ni / CaO相比，添加Re增加了催化剂的酸性位并增强了甘油的OH基的表面吸附。催化剂表面上吸附的甘油将进一步与吸附的CO ₂反应产生气体产物。因此，催化活性显着提高。