Navarro Claudia, Zaidi Adam, de Leeuwe Christopher, Spallina Vincenzo, Grasa Gemma
Environmental Research Group, Instituto de Carboquímica (Spanish National Research Council, ICB-CSIC), Miguel Luesma Castán 4, 50018 Zaragoza, Spain.
Department of Chemical Engineering, University of Manchester, Manchester M13 9PL, U.K.
Energy Fuels. 2024 Oct 16;38(21):20669-20680. doi: 10.1021/acs.energyfuels.4c02863. eCollection 2024 Nov 7.
A chemical looping (CL) reactor can provide the energy required to produce syngas from the reforming of glycerol. This can be done through the dynamic operation of packed-bed (PB) reactors that consecutively cycle in a three-stage process that includes oxidation, reduction, and a reforming stage. In this work, Ni-/Fe-based materials were synthesized, characterized, and tested as oxygen carriers and glycerol reforming catalysts during chemical looping reforming in packed-bed (CLR-PB) reactors. Two materials were prepared via coprecipitation/impregnation with different Ni loads (4.3 and 12 wt %) and similar Fe loadings (9.9 and 8.5% wt) and later on granulated to produce particles in a size cut of 0.6-1 mm. The materials presented high catalytic activity in a wide range of reforming temperatures (650-800 °C), being able to achieve over 95% glycerol-to-gas molar conversion in very short gas/solid contact times and at relevant conditions suitable for process scale-up. The results indicated that it is possible to produce materials with a low Ni load, which present sufficient catalytic activity and thermochemical capacity thanks to the presence of Fe, to operate under the glycerol CLR-PB configuration.
化学链（CL）反应器可以提供甘油重整生产合成气所需的能量。这可以通过填充床（PB）反应器的动态操作来实现，该反应器在包括氧化、还原和重整阶段的三阶段过程中连续循环。在这项工作中，合成、表征了镍基/铁基材料，并在填充床化学链重整（CLR-PB）反应器中作为氧载体和甘油重整催化剂进行了测试。通过共沉淀/浸渍法制备了两种材料，镍负载量不同（4.3和12 wt%），铁负载量相近（9.9和8.5 wt%），随后造粒以生产尺寸为0.6-1毫米的颗粒。这些材料在很宽的重整温度范围（650-800°C）内表现出高催化活性，能够在非常短的气/固接触时间和适合工艺放大的相关条件下实现超过95%的甘油-气体摩尔转化率。结果表明，有可能生产出低镍负载量的材料，由于铁的存在，这些材料具有足够的催化活性和热化学能力，能够在甘油CLR-PB配置下运行。
