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Feasibilty Study of Using Condensation in Increasing Diameter of Airborne Particulate Matter to Enhance Control Efficiency

Majidi Ghadikolaei, Saman | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45116 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Arhami, Mohammad
  7. Abstract:
  8. Particles with aerodynamic diameter of less than 10 μm can effectively pass through respiratory system and deposit on pulmonary areas wich cause adverse health effects. These particles are divided in to coarse particles (diameter: 2.5 to 10 μm) and fine particles (diameter < 2.5 μm). Fine particles can be more harmful for human’s health and harder to remove by air pollution control machines compare to coarse particle so it is crucial to find methods to enlarge the size of these particles. In this regards common methods such as utilizing electricity are costly and not efficient enough. Hence other economical and efficient methods such as using condensation are eamined. In this study the growth of particles has investigated experimentally via heterogeneous condensation as a preliminary technic to be implemented before control devices. The effect of four parameters was investigated: The condenser temperature, the saturator’s temperature, the temperature difference of condenser and saturator, and the length of the condenser. The saturator’s and condenser’s temperatures did not considerably affect, however but as the temperature difference increased, an increscent was seen in the particle’s growth a certain lengt.As the condenser length increased, the particle’s growth enhanced, however after a certain length increase it didn’t considerably changed. The results also indicated that the high density of particles could adversely affect the nucleation rate and sudden nucleation for all particles was not possible. The results indicate that, in temperature difference of 80oc, this method was able to decrease the up to 80% of particles smaller than 2.5 μm. The result of this study showed the significant potential of this method in increasing the efficiency of the air pollution control devices
  9. Keywords:
  10. Consolidation ; Air Pollution ; Air Particulate Matter ; Particle Growth ; Air Pollutants Control

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