Aerosol Filtration

Filtration of aerosols is omnipresent in our daily lives, in areas as diverse as health, the protection of people and the environment, and air treatment inside buildings. However, the collection of particles within a filter media is not, contrary to popular belief, linked to a simple screen effect. The phenomena involved are much more complex and require the consideration of aerosol interactions, filter media and process conditions to select the best fiber filter for a given application.
Aerosol Filtration, book for students, hygiene or process engineers, fibrous media manufacturers, designers, and filtration system suppliers or users addresses the filtration of aerosols in six chapters. These chapters cover physics and aerosol characterization, the fibrous media, and efficiency and filter clogging by solid or liquid aerosols, with special attention to the filtration of the nanoparticles.

• Analyses the behavior of fibrous media against solid and liquid aerosols
• Presents models of efficiency and pressure drop
• Introduces computing elements for estimating the lifetime of filters
• Provides guidance for designing filters and predicting their behavior over time

Universities; Research centers; R&D industries; Original Equipment Manufacturers of filtration systems

• Dedication
• Notation
• Introduction
• 1: An Introduction to Aerosols
  • Abstract
  • 1.1 Characteristics of a gaseous medium
  • 1.2 Inertial parameters
  • 1.3 Diffusional parameter
  • 1.4 Equivalent diameter
  • 1.5 Nanostructured particles
• 2: Fibrous Media
  • Abstract
  • 2.1 Introduction
  • 2.2 Manufacturing processes for non-woven media
  • 2.3 Developing “high-performing” fibers
  • 2.4 Characterization of fibrous media
  • 2.5 From web to filter
• 3: Initial Pressure Drop for Fibrous Media
  • Abstract
  • 3.1 Pressure drop across a flat media
  • 3.2 Pressure drop for pleated fibrous media
• 4: Initial Pressure Efficiency of a Fibrous Media
  • Abstract
  • 4.1 Introduction
  • 4.2 Estimating efficiency
  • 4.3 Single fiber efficiency
  • 4.4 Overall filter efficiency
  • 4.5 Conclusion
• 5: Filtration of Solid Aerosols
  • Abstract
  • 5.1 Overview
  • 5.2 Depth filtration
  • 5.3 Transition zone between depth filtration and surface filtration
  • 5.4 Surface filtration
  • 5.5 Reduction in filtration area
  • 5.6 Full models
  • 5.7 Influence of humidity in the air
• 6: Filtration of Liquid Aerosols
  • Abstract
  • 6.1 Overview
  • 6.2 Clogging by liquid aerosols
  • 6.3 Clogging models
  • 6.4 Binary mixture of liquid and solid aerosols
  • 6.5 Conclusion
• Adhesion of Particles
  • A.1 Van der Waals force
  • A.2 Capillary force
  • A.3 Electrostatic adhesion
  • A.4 Influence of roughness
  • A.5 Summary
• Index