Structured composite Ni(Cl_x)/CeO₂/η‐Al₂O₃/FeCrAl catalysts are developed for the reaction of preferential methanation of carbon monoxide in the presence of carbon dioxide. The use of a FeCrAl alloy wire mesh as a support for Ni(Cl)/CeO₂ allows preparation of a heat‐conducting catalyst that is similar in performance and physical‐chemical properties to the highly efficient catalysts in the form of micro pellets, as confirmed by catalytic tests and XRD, XPS, TEM, SEM, EDX characterization techniques. Catalytic tests are carried out in hydrogen‐rich mixture which contains (vol. %): 1 CO, 65 H₂, 10 H₂O, 20 CO₂, He – balance; weight hourly space velocity is 29,000 cm³g_cat⁻¹h⁻¹. The structured catalyst with highly dispersed nickel and optimal chlorine content provides CO removal to a level of <10 ppm in the temperature interval of 230–300 °C. XRD, TEM, SEM and EDX analysis confirm the presence of Ni nanoparticles and CeOCl species in the catalytic coating. XPS study of samples after reductive pretreatment (simulating CO preferential methanation reaction conditions) in the preparation chamber of the spectrometer reveals the metallic state of Ni and high concentrations of Cl and Ce³⁺ on the catalyst surface.

中文翻译：

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Ni（Clx）/ CeO2 /η-Al2O3/ FeCrAl丝网复合催化剂优先CO甲烷化的催化性能及表征

结构复合镍（CL _X）/的CeO ₂ /η-Al系₂ ö ₃ /铁铬铝催化剂对一氧化碳的优先甲烷化的在二氧化碳的存在下进行反应的发展。使用FeCrAl合金丝网作为Ni（Cl）/ CeO _2的载体，可以制备导热催化剂，该催化剂的性能和物理化学性质与微型颗粒形式的高效催化剂相似，例如经催化测试和XRD，XPS，TEM，SEM，EDX表征技术证实。催化试验是在含有（体积％）的富含氢气的混合物中进行：1 CO，65小时₂，10 H ₂ O，20 CO ₂，他–平衡；每小时重量空速为29,000 cm ³ g _cat ^-1 h ^-1。具有高度分散的镍和最佳氯含量的结构化催化剂可在230–300°C的温度间隔内将CO去除至<10 ppm的水平。XRD，TEM，SEM和EDX分析证实了催化涂层中存在Ni纳米颗粒和CeOCl物种。在光谱仪制备室中进行还原性预处理（模拟CO优先甲烷化反应条件）后对样品进行XPS研究，结果表明催化剂表面存在Ni的金属态以及高浓度的Cl和Ce ³⁺。