Regeneration of deactivated CeCoxO2 catalyst by simple thermal treatment  

作　　者：Yandi Cai Lihua Wang Shuohan Yu Jingfang Sun Baochun Liu Lin Dong 

机构地区：[1]College of Chemistry and Molecular Engineering,Nanjing Tech University,Nanjing 211800,China [2]Jiangsu Key Laboratory of Vehicle Emissions Control,School of the Environment,Center of Modern Analysis,Nanjing University,Nanjing 210093,China [3]Key Laboratory of Mesoscopic Chemistry of MOE,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210093,China

出　　处：《Journal of Rare Earths》2020年第8期899-905,I0003,共8页稀土学报（英文版）

基　　金：Project supported by the Opening Foundation of Jiangsu Key Laboratory of Vehicle Emissions Control(OVEC041);Major Scientific and Technological Project of Bingtuan(2018AA002)。

摘　　要：Active species loss owing to reactant stream washing is a general problem which industrial catalysts suffer from.In case of catalysts synthesized by co-precipitation method,which have active species unused in bulk phase,can be regenerated by a simple thermal treatment that leads to active species in bulk phase migration to surface of the deactivated catalysts.In this work,the influence of regeneration temperature was investigated by employing ammonium hydroxide washing to simulate reactant stream washing of CeCoxO2 catalysts for NO+CO reaction.It is found that the deactivated catalyst can be regenerated by simple thermal treatment and increasing calcination temperature could accelerate the Co species migration from the bulk phase to surface of catalysts.

关 键 词：NO+CO CEO2 Catalyst regeneration Thermal migration Rare earths 

分 类 号：TQ426[化学工程]