【摘要】 采用浸渍-化学镀的方法，经磷酸刻蚀合成出了Ni₃P/γ-Al₂O₃催化剂。实验考察了P与Ni物质的量比（P/Ni比）、络合剂种类、柠檬酸钠与镍的物质的量比（TSC/Ni比）以及不同种类和不同时间的酸处理对催化剂物相结构的影响。采用X射线衍射仪（XRD）、N₂-物理吸附和NH₃程序升温脱附（NH₃-TPD）对制备的催化剂进行表征，并以苯酚的十氢萘溶液（质量分率为1%）为原料考察了磷酸刻蚀前后催化剂的加氢脱氧反应性能。结果表明：选取P/Ni比为6，按照TSC/Ni比为1的比例添加柠檬酸钠作为络合剂，经磷酸刻蚀12 h后可获得纯相Ni₃P/γ-Al₂O₃催化剂。与刻蚀前相比，磷酸刻蚀后的催化剂酸性增强，表现出更高的低温加氢脱氧活性，150℃苯酚的转化率由65.5%提高到99.0%，环己烷选择性提高一倍；250℃时苯酚已完全转化，环己烷选择性高达98.7%。更多还原

【Abstract】 The Ni₃P/γ-Al₂O₃ catalyst was prepared by impregnation and electroless plating method through phosphoric acid etching. The effects of preparation conditions, including molar ratios of P to Ni（P/Ni）, varieties of complexing agent, molar ratios of sodium citrate/nickel（TSC/Ni）, varieties of acid and time of acid etching, on the crystal phase of the catalyst were investigated. The prepared catalysts were characterized by X-ray diffraction（XRD）, N₂ adsorption-desorption and NH₃ temperature programmed desorption（NH₃-TPD）. The hydrodeoxygenation（HDO） performance over the prepared catalysts before and after phosphoric acid etching was investigated using as the feed. The results showed that the pure phase Ni₃P/γ-Al₂O₃ catalysts were obtained when P/Ni ratio was 6, adding sodium citrate as complexing agent according to TSC/Ni ratio of 1, and etching with phosphoric acid for 12 h. Compared with the Ni₃P-Ni/γ-Al₂O₃ catalyst, the catalyst after phosphoric acid etching showed higher HDO activity at low temperature due to the enhanced acidity. the conversion of phenol increased from 65.5% to 99.0% and the cyclohexane selectivity increased doubled at 150 ℃. The phenol was completely converted and the cyclohexane selectivity of 98.7% at 250 ℃.更多还原