Currently

selective catalytic reduction (SCR) denitrification technology is the most effective technique to control emissions of nitrogen oxides from coal-fired power plants and it is widely utilized. The SCR catalyst is the core of SCR denitrification technology

which often encounters inactivation problems. The amount of harmful inactivated SCR catalyst is increasing with the increase in operation time of these power plants. V2O5 is the main active ingredient in the deactivated catalyst

and needs to be recovered. Three reducible organic acids

citric acid

tartaric acid

and oxalic acid were chosen to create an optimal experiment for recovery V2O5 from deactivated catalyst

and X-ray fluorescence was used to analyse the recovery result. The results demonstrated that oxalic acid has high acidity and strong reducibility

which provides a stronger acid environment for recovery V2O5 in the experiment. The oxalic acid recycling method only to control the reaction conditions

and no agent is needed to assist the recovery process. The experiment processes of oxalic acid simplify recovery method and are cost-effective.