The production of hydrogen by steam reforming of ethanol was carried out on SBA-15-supported nano NiO catalyst synthesized by the equivalent-volume impregnation method with two different Ni sources (nickel nitrate and nickel sulfamate). The catalyst was characterized by N2 adsorption–desorption, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy to examine the physical and chemical properties. The activity tests were performed with the steam, with water/ethanol molar ratio ranging from 2:1 to 15:1, the N2 flow rate from 20 to 120 mL min−1 to determine the space-time, and the temperature range from 623 to 923 K on the two different Ni source catalysts. A favorable operating condition was established at 823 K using water/ethanol = 6 molar ratio and carrier gas (N2) flow of more than 50 mL min−1 for nickel nitrate source, but for nickel sulfamate source, the optimum temperature changed to 773 K and other conditions were the same as for the nickel nitrate source. After eliminating the influence of internal and external diffusion factors, an empirical power-law kinetic rate equation was derived from the experimental data. The non-linear regression method was used to estimate the kinetic parameter. The activation energy of the catalyst was then calculated, and the supported nickel nitrate and nickel sulfamate catalysts were 25.345 and 41.449 kJ mol−1, respectively, which was in agreement with the experimental and model-predicted results.

中文翻译：

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一种高效稳定的Ni/SBA-15催化剂用于乙醇蒸汽重整制氢

采用等体积浸渍法合成了两种不同的镍源（硝酸镍和氨基磺酸镍），在 SBA-15 负载的纳米 NiO 催化剂上进行了乙醇蒸汽重整制氢。通过N2吸附-解吸、X射线衍射、X射线光电子能谱和透射电子显微镜对催化剂进行了表征，以检查其物理和化学性质。用蒸汽进行活性测试，水/乙醇摩尔比为 2:1 至 15:1，N2 流速为 20 至 120 mL min-1 以确定时空，温度范围为 623在两种不同的 Ni 源催化剂上达到 923 K。对于硝酸镍源，使用水/乙醇 = 6 摩尔比和超过 50 mL min-1 的载气 (N2) 流量在 823 K 下建立了有利的操作条件，但对于氨基磺酸镍源，最佳温度更改为 773 K其他条件与硝酸镍源相同。在排除内外扩散因素的影响后，根据实验数据推导出经验幂律动力学速率方程。非线性回归方法用于估计动力学参数。然后计算催化剂的活化能，负载的硝酸镍和氨基磺酸镍催化剂分别为25.345和41.449 kJ mol-1，这与实验和模型预测结果一致。最适温度改为 773 K，其他条件与硝酸镍源相同。在排除内外扩散因素的影响后，根据实验数据推导出经验幂律动力学速率方程。非线性回归方法用于估计动力学参数。然后计算催化剂的活化能，负载的硝酸镍和氨基磺酸镍催化剂分别为25.345和41.449 kJ mol-1，这与实验和模型预测结果一致。最适温度改为 773 K，其他条件与硝酸镍源相同。在排除内外扩散因素的影响后，根据实验数据推导出经验幂律动力学速率方程。非线性回归方法用于估计动力学参数。然后计算催化剂的活化能，负载的硝酸镍和氨基磺酸镍催化剂分别为25.345和41.449 kJ mol-1，这与实验和模型预测结果一致。非线性回归方法用于估计动力学参数。然后计算催化剂的活化能，负载的硝酸镍和氨基磺酸镍催化剂分别为25.345和41.449 kJ mol-1，这与实验和模型预测结果一致。非线性回归方法用于估计动力学参数。然后计算催化剂的活化能，负载的硝酸镍和氨基磺酸镍催化剂分别为25.345和41.449 kJ mol-1，这与实验和模型预测结果一致。