甲醛湿式氧化催化剂的制备及性能研究

Preparation and Properties of Catalysts for the Wet Oxidation of Formaldehyde

用FTIR和N2吸附法对活性炭进行表面分析，通过原子吸收光谱考察了铜在活性炭表面的吸附行为，制备了几种甲醛湿式氧化的催化剂，对比研究了它们在常温常压下对甲醛氧化的催化性能。结果表明，活性炭氧化改性后表面含氧基团增加，对铜和甲醛的吸附性能提高。活性炭表面负载的铜、银、铁对甲醛湿式氧化都有一定的催化能力，其中栽铜活性炭的催化效果最好，载铁活性炭的催化性能优于载银活性炭，催化动力学曲线表明，氧化改性后，载铜活性炭的催化性能进一步提高。

The Activated carbon （AC） was characterized by FTIR and N2 adsorption technique. Adsorption of copper on AC was investigated by AAS. Several kinds of catalysts for the wet oxidation of formaldehyde were prepared, and their catalytic performance was studied. It has been concluded that the surface area is increased after AC is modified by HNO3, but that of AC modified by H2O2 is reduced. The modifications have created more surface groups （especially C-O） that improve adsorption of copper and formaldehyde. Copper, silver and iron supported on AC have all catalytic performance for the oxidation of formaldehyde by H2O2. By comparison, Copper on AC is the most effective in the three kinds of catalysts, and iron on AC is more effective than silver on AC. The catalytic kinetics curve shows that the oxidative modifications of AC improve the catalytic capability of copper on AC.