Performance Management of a DeNOx System for Stationary Sources and Regeneration Strategies of DeNOx Catalysts

Numerous stationary NOx emission sources have employed a suitable deNOx technology that is typically selective catalytic reduction (SCR) of NOx by NH3 over V2O5/TiO2-based catalysts with on-demand monolithic structures. These structured catalysts undergo a time-on-deterioration of deNOxing activity on site. Thus, we need more efficient, more deactivation-tolerant, more economic deNOx systems and for which, their performance management is essential. This review has covered details of strategies to successfully manage the performance of SCR catalysts and timely replace them to new or rejuvenated ones. Key considerations to maintain the catalyst activity will be reviewed. Details of the sequential addition of new catalysts and the replacement of life-end catalysts and their regeneration will be discussed with general guidances to determine the time for such a replacement. Finally, a better way to get more economic approaches to deNOx system management will be proposed here.