Hydrodechlorination of Chlorobenzene over Silica-Supported Nickel Phosphide Catalysts
Hydrodechlorination of Chlorobenzene over Silica-Supported Nickel Phosphide Catalysts
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DOI：
10.1021/ie7017542
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发表时间：
2008-07
影响因子：
4.2
通讯作者：
Xuguang Liu;Jixiang Chen;Jiyan Zhang
中科院分区：
文献类型：
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作者：
Xuguang Liu;Jixiang Chen;Jiyan Zhang
采用程序升温还原法由磷酸镍前体制备了二氧化硅负载的Ni₃P、Ni₁₂P₅和Ni₂P催化剂。还制备了一种Ni/SiO₂催化剂作为参照。研究了前体中初始Ni/P摩尔比对催化剂结构和加氢脱氯性能的影响。通过N₂吸附、氢气程序升温还原、X射线衍射、X射线光电子能谱、紫外 - 可见光谱、氢气程序升温脱附以及电感耦合等离子体光谱等方法对催化剂的物理化学性质进行了表征。在常压固定床反应器中评估了催化剂在氯苯加氢脱氯反应中的活性。二氧化硅负载的磷化镍表现出比负载型镍更优异的加氢脱氯活性。这可归因于磷化镍特殊的物理化学性质以及大量的溢流……
Silica-supported Ni3P, Ni12P5, and Ni2P catalysts were prepared by the temperature-programmed reduction method from nickel phosphate precursors. A Ni/SiO2 catalyst was also prepared as a reference. The effect of the initial Ni/P molar ratio in the precursor on the catalyst structure and hydrodechlorination performance was investigated. The physicochemical properties of the catalysts were characterized by means of N2 adsorption, hydrogen temperature-programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy, ultraviolet and visible spectroscopy, hydrogen temperature-programmed desorption, and inductively coupled plasma spectroscopy. The catalyst activities in the hydrodechlorination of chlorobenzene were evaluated in a fixed-bed reactor at atmospheric pressure. The silica-supported nickel phosphides exhibited superior hydrodechlorination activities to that of supported nickel. This can be attributed to the special physicochemical properties of nickel phosphides and a great amount of spillove...