4) A power plant burns 104 kg hr-1 of coal that contains 2.5% sulfur.
The stack is 50 m high, and the plume typically rises 30 m.
a) Calculate the ground-level concentration of SO2 (in (g m-3) 800 m
downwind from the source directly under the plume under the following
conditions: Wind speed = 4 m s-1, moderately sunny day (moderately
unstable conditions).
b) Repeat the above calculation for a stack height of 75 m and a wind
speed of 6 m s-1.
Surface Wind Speed
Insolation Cloud cover <2 2 to 3 3 to 5 5 to 6 >6
Strong sun A A-B B C C
Day Mod. Sun A-B B B-C C-D D
Slight sun B C C D D
Day or Overcast D D D D D
Night
Night ≥ 0.5 cloud cover
E D D D
≤ 0.4 cloud cover
F E D D
Chemistry Homework Solutions
#149337
SO2 Concentration Downwind from a Power Plant
4) A power plant burns 10^4 kg hr-1 of coal that contains 2.5% sulfur. The stack is 50 m high, and the plume typically rises 30 m.
a) Calculate the ground-level concentration of SO2 (in micrograms m-3) 800 m downwind from the source directly under the plume under the following conditions: Wind speed = 4 m s-1, moderately sunny day (moderately unstable conditions).
b) Repeat the above calculation for a stack height of 75 m and a wind speed of 6 m s-1.
Please see attachment for graph and tabular column.
Calculations required to show concentration of SO2 downwind from a poerplant are depicted in fine detail.
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