化学镀制备Pd催化剂及在甲醛催化燃烧中的应用

为实现采用催化燃烧法对甲醛进行净化处理,采用化学镀法制备Pd-堇青石蜂窝陶瓷整体式催化剂,并对催化剂进行表征和活性评价。结果表明:化学镀法可以实现纳米Pd微晶颗粒在堇青石蜂窝陶瓷载体上均匀负载,焙烧后PdO与载体结合牢固,具有良好的抗振荡性和热稳定性;500℃焙烧的Pd-堇青石蜂窝陶瓷整体式催化剂的催化活性最高,在甲醛质量浓度为0.4~10 mg/m3,空速为1 500~6 000 h-1的条件下,催化剂具有良好的活性。

Preparation of Pd Monolithic Catalyst for Formaldehyde Catalytic Combustion by Electroless Plating

The catalytic combustion method was used for the purification of formaldehyde.Pd-cordierite monolithic catalysts were prepared by electro-less plating method.The catalyst was characterized and had active evaluation.The results showed that Pd nano-particles were obtained and dispersed symmetrically over cordierite substrates without the coating.PdO had a strong adhlhesion to the substrate and it had a good anti-vibration and thermostability after calcined.Pd-cordierite monolithic catalysts had the highest activity calcined at 500 ℃,the catalysts had a good catalytic activity in large rage of formaldehyde mass concentration of 0.4~10 g/m3 and space velocity of 1 500~6 000 h-1.