通过ICP-AES和XRD等表征手段,考察了稀土金属Ce化合物对Cu基氧氯化催化剂活性及稳定性的影响.研究表明,Ce在反应初期转变成的CeO2具有储存和传递氧的功能,从而提高催化剂的活性.在400℃反应300 h后,催化剂的活性显著下降,其原因是由于86%的Ce与载体发生作用,生成难溶的物质,失去助催化的作用.同时,随着反应的进行,CeO2晶相晶粒长大也造成催化剂活性下降.
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