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Question
How do they measure a ton of emissions in the air quailty reports? Is it a weight of particles? A volume?
The emission is weight based. For example, if you have an exhaust gas with 3% CO2 in it, at 230 C, and 2000 Cu M/ Hr.
that represents an emission. If the CO2 is 3% by volume, then one more correction is needed the volume is 3% * 2000 = 60 cubic meters. Next correct it to Standard Temperature and pressure. The temperature conversion is (273/(273+230)) giving you about 32.56 Cu M/ Hr. The weight can be found by multiplying by 32560(liters)/22.4 liters/ mole * 44 grams/ mole(MW of CO2) = 63996 grams/ hr or 64 Kg/ Hr. since there are 52*7*24 hours in a year(8736 hours), the emission weight is 558808747.grams, divided by 1000000 grams per metric ton which is 558 metric tons per year.
Dave Russell
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Air Quality
Answers by Expert:
Dave Russell
Expertise
I can answer questions on industrial practice, emissions, and impacts of air pollutants. I`m also good on regulatory and policy questions, but have an admitted anti-regulatory bias.
Experience
I've been in consulting engineering for over 30 years.
Organizations
Am. Inst. of Chemical Engineers., Water Environment Federation
Publications
Too many to list here. I'm currently writing an editorial piece for PollutionOnLine.com once monthly on industrial perspectives on pollution control.
Education/Credentials
BS & MS in Environmental Engineering, Instructor for Am. Inst. of Chemical Engineers
Awards and Honors
Who's Who in Engineering
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