Abstract In this study, a series of Ni−Ce0.6Zr0.4O2 catalysts, which were synthesized by co-precipitation followed by calcination at different temperatures, were applied for the deoxygenation of oleic acid. The physicochemical properties of the catalysts were characterized by N2 adsorption-desorption, X-ray diffraction (XRD), H2 chemisorption, H2 temperature-programmed reduction (H2-TPR), NH3 temperature-programmed desorption (NH3-TPD), and X-ray photoelectron spectroscopy (XPS). The Ni−Ce0.6Zr0.4O2 catalyst calcined at 300 °C exhibited the highest conversion for oleic acid as well as selectivity for diesel-range compounds. It is predominantly related to the highest amount of free NiO species. In addition, the acidity of the catalyst significantly affected the selectivity and distribution of products.

中文翻译：

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煅烧温度对游离NiO物种与Ni-Ce 0.6 Zr 0.4 O 2 脱氧催化剂催化活性之间的关系的影响，用于生物柴油生产

摘要 本研究将一系列Ni-Ce0.6Zr0.4O2催化剂通过共沉淀和不同温度煅烧合成，用于油酸的脱氧。催化剂的理化性质通过N2吸附-解吸、X射线衍射（XRD）、H2化学吸附、H2程序升温还原（H2-TPR）、NH3程序升温脱附（NH3-TPD）和X-射线光电子能谱（XPS）。在 300 °C 下煅烧的 Ni-Ce0.6Zr0.4O2 催化剂表现出最高的油酸转化率和柴油范围化合物的选择性。它主要与最高数量的游离 NiO 物种有关。此外，催化剂的酸度显着影响了产物的选择性和分布。