What is carbon sequestration? A 500MW coal fired power plant is burning coal that contains 200ppb of mercury. The coal firing rate is 500,000 lb/hr and the flue gas flow rate is 2 million scfm. The mercury standard that must be met is 0.015lb/GWh of gross energy output. Calculate the overall mercury capture percentage that is required to meet this standard. If the wet scrubber can remove 60% of the mercury that comes into it, what removal efficiency is needed for the activated carbon injection/baghouse system? [3+7+5=15]