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将导热性能良好的泡沫铝作为载体,羰基钌为前驱体制备了一系列不同形态的钌基催化剂应用于N2O的低温催化分解研究.采用XRD、XPS、SEM、TEM、BET、H2-TPR等方法对催化剂进行了表征,于石英管固定床反应器上对催化剂性能进行了评价.重点考察了泡沫铝作为催化剂载体的可行性、载体的处理方法对催化剂活性的影响以及RuO2、Ru、Ru3(CO)12所表现出的活性差异.结果表明:泡沫铝作为催化剂载体,能够促进N2O的催化分解;泡沫铝经H2O2处理有利于提高其对活性中心的附着力,提高催化活性;N2O浓度为1%,Ru负载量为0.3%,活性中心分别为Ru3(CO)12、Ru、RuO2时,N2O完全转化温度依次为285、380和415℃;活性较高的Ru3(CO)12/泡沫铝催化剂在长时间作用后活性组分转变为RuO2.
A series of ruthenium-based catalysts with different morphologies were prepared using foamed aluminum with good thermal conductivity as carrier and ruthenium carbonyl as precursor to study the low-temperature catalytic decomposition of N 2 O. XRD, XPS, SEM, TEM, BET and H2-TPR methods The catalyst was characterized and its performance was evaluated on a quartz tube fixed bed reactor.The feasibility of using aluminum foam as catalyst carrier, the effect of carrier treatment method on the activity of catalyst and the effect of RuO2, Ru, Ru3 (CO ) 12 showed that: aluminum foam as a catalyst carrier can promote the catalytic decomposition of N2O; aluminum foam by H2O2 treatment is conducive to improving its adhesion to the active center and improve the catalytic activity; N2O concentration of 1% Ru 3 (CO) 12, Ru and RuO2 respectively, the complete conversion temperatures of N2O were 285, 380 and 415 ℃, respectively. The higher activity of Ru3 (CO) 12 / After a long time the active ingredient is converted to RuO2.