0 acfm at 80o F and 14.7 psia and contains 700 ppm HCl. Calculate the concentration of the outlet gas from a spray tower given the number of sprays is 8in this spray tower, the number of overall gas transfer units (NOG) for the top spray is 0.9. Each lower spray can be assumed to have 50% of the NOG of the spray above it. An inlet duct spray has a NOG of 0.

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Air flow from a process hood is 30,000 acfm at 80o F and 14.7 psia and contains 700 ppm HCl. Calculate the concentration of the outlet gas from a spray tower given the number of sprays is 8in this spray tower, the number of overall gas transfer units (NOG) for the top spray is 0.9. Each lower spray can be assumed to have 50% of the NOG of the spray above it. An inlet duct spray has a NOG of 0.7. For purposes of calculation, Henry’s Law constant may be assumed to be equal to zero.

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