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Impact of Oxygen-enriched Air Combustion by Membrane System on Performance of Diesel Engine and Air Pollutants Emission

Shoaee Maddah, AmirHossein | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52016 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Soltanieh, Mohammad
  7. Abstract:
  8. Oxygen enriched combustion is one of the attractive combustion technologies to control pollution and improve combustion in diesel engines. In the present work after an introduction to membrane seperation and membrane seperators for oxygen-nitrogen from air, a simulation of combustion chamber by GT-Power and membrane COMSOL Multiphysics was used to study the impact of oxygen enrichment on combustion, pollution and performance parameters with 23, 25 and 27% levels of enrichment. Increasing the oxygen engine content with the air leads to faster burn rates and the ability to burn more fuel at the same stoichiometry. These effects have the potential to decrease specific fuel consumption and increase power output of a Diesel engine. When oxygen is enriched the combustion air, CO and unburned hydrocarbons emissions, decrease significantly. Enriched oxygen also leads to shorter ignition delays and consequently increased power output of the Diesel engine. However, the increased oxygen content in the combustion air is also expected to increase NOx emission levels because of the higher combustion temperatures. The anticipated increase in NOx emissions could be controlled by exhaust gas recirculation (EGR) or using of emulsified fuel
  9. Keywords:
  10. Oxygen Enrichment Air ; Membrane Separation ; Engine Performance ; Air Pollution ; Vehicle Pollutants Emission ; Environmental Pollutant ; Diesel Engines

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