Regeneration of deactivated CeCoxO2 catalyst by simple thermal treatment
来源期刊：JOURNAL OF RARE EARTHS2020年第8期
论文作者：Yandi Cai Lihua Wang Shuohan Yu Jingfang Sun Baochun Liu Lin Dong
文章页码：899 - 905
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.
Yandi Cai1，Lihua Wang1，Shuohan Yu2,3，Jingfang Sun2，Baochun Liu1，Lin Dong2,3
1. College of Chemistry and Molecular Engineering,Nanjing Tech University2. Jiangsu Key Laboratory of Vehicle Emissions Control,School of the Environment,Center of Modern Analysis,Nanjing University3. Key Laboratory of Mesoscopic Chemistry of MOE,School of Chemistry and Chemical Engineering,Nanjing University
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.
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