NOx Emission Factors

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NOx Emission Factors

• Robert Fowler
• ME 449 Sustainable Air Quality
• April 2001

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Table of Contents

• Objective of work
• Major contributors for NOx emissions
• Example emission factor calculations
• State source of data used
• Why?

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Objective

• The purpose of this report is to show how
  emission inventories are obtained through
  calculations of emission factors in conjunction
  with fuel sources.

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Major NOx Contributors

• There are three major contributors to the
  creation of NOx emissions
• Transportation - gas and diesel vehicles
• Fuel Combustion - power plants
• Industrial Processes - waste disposal/petroleum
  refinery

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Sample Calculations

• To determine the amount of emission you get from
  a source, you have to take into consideration two
  factors
• The emission factor
• The fuel used
• EF fuel mass Emission Inventory

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Source of Data

• The source of the data used is from the EPA AP-42
  5th ed. Vols. I (Chapters 1-5, 11) and II
  (Appendix G).

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As for the emission factor rating found in the
AP-42, it is how accurate the emission factor for
the given source of emission is to the true
value. A being very close and E being not.
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This is important to know so that we can see if
we are getting better at reducing the amount of
NOx emissions in our atmosphere.
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Summary

• The major contributors of NOx emissions
• How emission inventory is determined
• Where data came from
• Why?

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Conclusion

• There are some sources of NOx emissions that are
  still way too high. Yet there seem to have been
  remarkable strides in reducing some of these over
  time. We just need to drive ourselves harder to
  help fix the problem. If you are not part of the
  solution, you are part of the problem.

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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.