© Dr. Steve Rapp, 2004
Remember the law of conservation of mass.
No element mass is lost or gained and the
plant is at steady state.
Input = Output so Mass of S in coal feed =
Mass of S in Ash + Mass of S in stack gas,
.01 (20,000 ton) = .02 (1000 ton) + S
200 ton = 20 ton + S
S= 200 ton – 20 ton =