Assuming conservatively that one-eighth of the catalyst is replaced each year on average for coal-fired units, the annual demand for replacement SCR catalyst would increase by 12,600 m3/yr by 2005.
The need to replace SCR catalyst increased every year.
mnli hypothesis: The need to replace SCR catalyst increased every year. premise: Assuming conservatively that one-eighth of the catalyst is replaced each year on average for coal-fired units, the annual demand for replacement SCR catalyst would increase by 12,600 m3/yr by 2005.