以二氧化硅气凝胶为载体,采用等体积浸渍法制备了一系列不同负载量的过渡金属氧化物M/SiO₂-ag(M=Ni、Co、Cu、Fe、Mn、Zn)催化剂,利用XRD、BET、H₂-TPR等对催化剂进行表征,研究了SiO₂气凝胶负载过渡金属氧化物分解N₂O的催化性能。结果表明,负载NiO的样品具有最高的催化分解活性,当NiO负载量为27%时催化活性最佳,可在451℃完全转化N₂O;在455℃下对Ni₂₇/SiO₂-ag进行100 h寿命实验,催化活性未下降,表明Ni₂₇/SiO₂-ag具有较好的热稳定性。

Using SiO₂ aerogel as the carrier,a series of transition metal oxides catalysts,M/SiO₂-ag (M=Ni,Co,Cu,Fe,Mn,Zn),with different loadings are prepared via an equal volume impregnation method.The prepared catalysts are analyzed by means of XRD,BET and H₂-TPR.Their catalytic performance for the decomposition of N₂O is studied.Among them,the sample loaded with NiO has the highest catalytic decomposition activity.The catalyst has the best catalytic activity when the loading amount of NiO is 27%,over which N₂O can completely be converted at 451℃.The catalytic activity of Ni₂₇/SiO₂-ag does not drop after 100 h of life test at 455℃,indicating that Ni₂₇/SiO₂-ag has a good thermal stability.

王逸飞(1993-),男,硕士研究生,研究方向为工业催化减排,wyfcupb@163.com