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(SCR Process) $V_2O_5/TiO_2$      . $V_2O_5/TiO_2$    8     . ICP-AES ,   $V_2O_5/TiO_2$             . $NH_3$ -TPD ,             .                   . 【Factors acting on the deactivation of $V_2O_5/TiO_2$ catalysts were investigated in the selective catalytic reduction(SCR) process for long term operation. The activity of $V_2O_5/TiO_2$ catalysts was decreased rapidly after 8 months from the starting of operation in the selective catalytic reaction processes. From ICP-AES analysis, the deactivation of the used catalysts could be caused from the calcium component included in urea solution as a reducing agent. It was found from the $NH_3$ -TPD experiments that the strong basic element like Ca component drastically affected the acidity of the $V_2O_5/TiO_2$ catalyst. The results gave an explanation on the reason why the component of Ca, even though its concentration is very low, could lead to the deactivation of $V_2O_5/TiO_2$ catalyst in the selective catalytic reaction processes.】

Effects of Calcium on the Activity of V2O5/TiO2Catalysts in SCR Processes

Effects of Calcium on the Activity of V₂O₅/TiO₂Catalysts in SCR Processes