Considering the initial fill demand of 26,000 m3 / yr from 65 GWe of SCR installations and replacement demand of 22,300 m3 / yr from 150 GWe of cumulative SCR installations plus the worldwide catalyst replacement demand of between 5,000 and 8,000 m3 / yr , the annual excess capacity is estimated to be 31,000 to 34,000 m3 / yr .
The excess capacity is stored for future use .