摘要
采用浸渍法制备了Ni/Al2O3、Ni/TiO2、Ni/活性炭和Ni/硅藻土等一系列镍系催化剂,研究了其催化对硝基苯酚加氢制备对氨基苯酚的活性。负载型镍系催化剂具有单一的对氨基苯酚选择性。不同载体负载的催化剂上对硝基苯酚的转化率顺序为:Ni/活性炭>Ni/硅藻土>Ni/TiO2>Ni/Al2O3。高比表面积以及金属镍在活性炭上的良好分散性使得Ni/活性炭催化活性最高;NiO与硅藻土间弱相互作用,有助于提高活性;而NiO与Al2O3之间存在相互作用抑制了还原后金属镍的催化加氢活性。
The catalytic activities of Ni/diatomite, Ni/activated carbon, Ni/TiO2 and Ni/Al2O3 for hydrogenation of p-nitrophenol to p-aminophenol are studied. The supported Ni catalysts have high selectivity toward formation of p-aminophenol. The catalytic activity for hydrogenation of p-nitrophenol to p-aminophenol of the supported Ni catalysts follows the order: Ni/activated carbon 〉 Ni/diatomite 〉 Ni/TiO2 〉 Ni//Al2O3. The high activity of Ni/activated carbon can be ascribed to its high specific surface area and high dispersion extent of Ni on activated carbon. The weak interaction between Ni and diatomite is of benefit to the activity of Ni/diatomite, however, the strong interaction between Ni and Al2O3 restricts the activity of Ni/Al2O3.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2008年第11期55-57,59,共4页
Modern Chemical Industry
基金
江苏省新产品基金(200470)资助
镇江市产学研基金(200473)资助
关键词
对氨基苯酚
对硝基苯酚
镍
加氢
p-nitrophenol
p-aminophenol
nickel
hydrogenation
作者简介
陆惠红(1984-),女,硕士生;刘于民(1960-),男,教授级高工,主要研究方向为化学工程,0511—88787591,yuminl@sina.com;
殷恒波(1963-),男,教授,主要研究方向为化学工程与材料化学,yin@ujs.edu.cn。