On-Site SCR Catalyst Rejuvenation Process as Part of a Catalyst Management Plan

摘要

The on-site catalyst rejuvenation process is a highly efficient tool to reduce operating and maintenance costs for lifetime extension of catalysts for selective catalytic reduction (SCR) of NOx compared to catalyst exchange and/or additional catalyst installation.Depending on the type of deactivation,the process is fit to the requirements based on our experience.Thus the tailor-made process can handle deactivation types like pluggage,alkali and earth alkaline depositions,and more.One of the important constraints is to perform the rejuvenation on-site within the given outage of the boiler to reduce any additional costs and risks.New results from rejuvenations performed on SCR catalysts from coal and oil fired units are presented.A cost analysis compared to the additional catalyst installation is given as part of a catalyst management plan.