Question

A power plant burns 150 U.S. short tons of coal per day, and there are 18.2 lb. of flue gas produced per pound of coal. The sulfur content of the coal is 2.0 percent and the molar mass (molecular weight) of the flue gas is 30.5. If all the sulfur in the coal appears as SO₂ in the flue gas, what is the concentration of SO₂ in the flue gas in parts per million?

Answer 1

first we will convert ton to pound

150 tons = 300000 pounds, per pound of coal produce 18.2 lb

1 pound=18.2 lb therefore, 300000 pounds = how many?

first we wiill convert lb to kgs

18.2 lb= 8.2553 kg

1 pound= 8.2553 kg

300000=?

=300000*8.2553=2476590/1=2476590 KGS

2476590/30.5 (MOLAR MASS OF GAS)=81199.6 MOLES

2479590*2=4953180/100=49531.8 Sulpher prsent

49531.8/32=1547.86 moles (S)

therefore 1 mole (S) = 1 mole SO2, 1547.86*64=99063.6 kGS

99063.6/Total wt of flue gas,99063.6/2479590=0.04*100=4 percent SO2

1 % =10000 PPM, Therefore, 4% =40000 ppm concentration of SO2 PRESENT