Abstract To develop an efficient catalyst for deoxygenation (DO) as the first step in biojet fuel production with silica-supported Ni/Al catalysts, the effects of silica supports were investigated in terms of pore structure, acidity, and pore size. The pore structures of silica were covered from microporous SiO2 to mesoporous SBA-15, SBA-16, and KIT-6. Then, taking a simple tubular structure of Ni/Al-SBA-15 with the best biojet fuel yield, samples with various acidity and pore sizes were further prepared through manipulation of the amount of aluminum (Al)-incorporation and the temperature of hydrothermal synthesis, respectively. The DO reactivity of the prepared silica-supported Ni/Al catalysts was assessed with methyl palmitate as a model compound of biomass feedstock. Based on the altered physicochemical properties of not only the silica support but also the supported Ni, the relationship between the variation of silica supports and their DO catalytic properties was investigated. This work provides a better understanding of silica-supported Ni/Al catalysts and how to design selective catalysts for DO reaction to maximize the biojet fuel hydrocarbon yield.

中文翻译：

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二氧化硅载体对介孔二氧化硅负载 Ni/Al 催化剂上棕榈酸甲酯脱氧的影响

摘要 为了开发一种高效的脱氧 (DO) 催化剂，作为使用二氧化硅负载的 Ni/Al 催化剂生产生物喷气燃料的第一步，研究了二氧化硅载体对孔结构、酸度和孔径的影响。二氧化硅的孔隙结构从微孔 SiO2 到介孔 SBA-15、SBA-16 和 KIT-6。然后，采用具有最佳生物喷气燃料产率的Ni/Al-SBA-15的简单管状结构，通过控制铝（Al）掺入量和水热合成温度，进一步制备了各种酸度和孔径的样品， 分别。用棕榈酸甲酯作为生物质原料的模型化合物评估了制备的二氧化硅负载的 Ni/Al 催化剂的 DO 反应性。基于二氧化硅载体和负载Ni的物理化学性质的改变，研究了二氧化硅载体的变化与其DO催化性能之间的关系。这项工作提供了对二氧化硅负载的 Ni/Al 催化剂以及如何设计用于 DO 反应的选择性催化剂以最大化生物喷气燃料碳氢化合物产量的更好理解。