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NOx Emission Factors Bravo Robert, terrific progress!!

NOx Emission Factors Bravo Robert, terrific progress!!. Robert Fowler ME 449: Sustainable Air Quality April 2001. Table of Contents. Objective of work Major contributors for NOx emissions Emission factor equations Data sources Summary Recommendations. Objective.

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NOx Emission Factors Bravo Robert, terrific progress!!

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  1. NOx Emission FactorsBravo Robert, terrific progress!! Robert Fowler ME 449: Sustainable Air Quality April 2001

  2. Table of Contents • Objective of work • Major contributors for NOx emissions • Emission factor equations • Data sources • Summary • Recommendations

  3. Objective Show emission inventory calculations Method Web search and EPA manual AP-42 (Make the link here)

  4. Major Contributors to NOx • Transportation - gas and diesel vehicles • Fuel combustion - power plants • Industrial Processes - waste disposal/petroleum refinery • (NOX Emissions pie?)

  5. Transportation emission equation Driving factors: Emission factor and vehicle miles traveled Equation for emission factor EF = (BER*OMTCF+OMTTAM)*SALCHF*TF • BER - basic emission rate • OMTCF - operating mode/temperature correction factor • OMTTAM - Tampering offset • SALCHF - Speed correction factor • TF - Travel fraction To get the emission inventory: EI = EF * VMT

  6. Fuel combustion emission equation Driving factors: emission factor & quantity of fuel consumed Emission factor: Mass of pollutant/mass of fuel (or output) Boilers - lb NOx/ton fuel ICE’s - lb NOx/hp-hr power output and lb NOx/MMBtu fuel input Gas turbines - lb NOx/MMBtu fuel Stationary diesels - lb NOx/hp-hr power output and lb NOx/MMBtu fuel input Stationary dual fuel engines - lb NOx/hp-hr power output and lb NOx/MMBtu fuel input

  7. Industrial Processes emission equations Driving factors: Emission factor and mass of fuel burned Emission factor: mass pollutant/mass (or volume) fuel • Solid waste disposal - kg NOx/Mg refuse or lb NOx/ton refuse • Sewage sludge - kg NOx/Mg refuse or lb NOx/ton sludge • Medical - kg NOx/Mg refuse or lb NOx/ton refuse • Open burning - kg NOx/Mg refuse or lb NOx/ton refuse • Auto Body - kg NOx/Mg refuse or lb NOx/ton refuse • Evaporation losses - g/drum or lb/drum • Petroleum refineries - kg NOx/103 L fresh feed; lb NOx/1000 bbl (barrel) fresh feed; kg NOx/1000 m3 gas burned; lb NOx/1000 ft3 gas burned; kg NOx/103 L refinery feed; lb NOx/1000 bbl refinery feed

  8. Data Source • Transportation data - EPA AP-42 Vol II Appendix G • Fuel combustion and industrial processes - EPA AP-42 Vol I Chapter 1-5, 11 (Add web links)

  9. Summary • The major contributors of NOx emissions • How emission inventory is determined • Where data came from Conclusion • NOx emissions still too high (stick to the topics you covered )

  10. Recommendations • Look over the data and see where some of the controls added to try and clean the pollutant from the emission is actually doing more harm than good. • Try to cut down on the amount of production of fuel sources that needs to be burned to be used. • (think of putting the above message in more specific terms – I.e. which parts of the emission factors could be reduced • by engineering • by …..

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