Abstract In this work, porous catalytic membrane with tailored microstructure has been developed for the production of hydrogen from the oxy-reforming process. Porous catalytic membranes have been produced by freeze-casting of ceria-based powders using camphene as solvent. The process parameters have been optimized in terms of type and amount of dispersant to obtain homogeneous and stable ceramic suspension suitable for the process, while the freezing temperature was chosen on the basis of the microstructure and porosity of the final samples. The obtained freeze cast sample produced showed very high levels of porosity (≈ 80%) and good gas permeability (1.0 × 10−11 m2). The ceria-based porous structure produced was finally evaluated as catalyst in high temperature oxy-reforming reaction for hydrogen production from methane showing high methane conversions (up to 90%) and hydrogen production. The use of a unique catalytic membrane other than pelleted catalysts allowed the obtaining of smooth thermal profiles without the evidence of endothermic or exothermic peaks.

中文翻译：

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用于氧重整制氢的冻铸多孔膜催化剂

摘要 在这项工作中，已经开发了具有定制微结构的多孔催化膜，用于从氧重整过程中生产氢气。多孔催化膜已经通过使用莰烯作为溶剂的氧化铈基粉末的冷冻浇铸来生产。在分散剂的类型和用量方面对工艺参数进行了优化，以获得适用于该工艺的均匀稳定的陶瓷悬浮液，而冷冻温度则根据最终样品的微观结构和孔隙率进行选择。获得的冷冻铸造样品显示出非常高的孔隙率 (≈ 80%) 和良好的透气性 (1.0 × 10−11 m2)。产生的氧化铈基多孔结构最终被评估为高温氧重整反应的催化剂，用于从甲烷制氢，显示出高甲烷转化率（高达 90%）和制氢。使用不同于粒状催化剂的独特催化膜可以获得平滑的热曲线，而没有吸热或放热峰的迹象。