Nanofiber Filter Technologies for Filtration of Submicron Aerosols and Nanoaerosols

Wallace Woon-Fong Leung

• Publisher: Elsevier
• Year: 2021
• Print ISBN:
  9780128244685
• eBook ISBN:
  9780323859851
• Topic: Technology & Engineering
• Subtopic: Chemical & Biochemical Engineering
• Index: Technology & Engineering

Nanofiber Filter Technologies for Filtration of Submicron Aerosols and Nanoaerosols covers the nanoaerosols (less than 100 nanometers) to larger submicron aerosols due mostly to pollution, which are present in high number concentration in our surroundings. People are breathing these nanoaerosols daily without being aware of it. Airborne viruses from flu to coronaviruses are also nanoaerosols. During the COVID-19 pandemic, it took a long time for health authorities and the General Public to recognize the airborne transmission mode of the virus. This leads to inadequate protection and ineffective virus control strategies resulting in high infection and death rates. The book cites evidence and observations pointing to the airborne transmission mode of the coronavirus. It also discusses different filtration technologies using nanofibers to capture these aerosols for short-term filtration, where aerosols are trapped in the filter (depth filtration), and long-term filtration, where aerosols are trapped in the growing filter cake (cake filtration). This book provides a good understanding on how nanofibers, which is of size 1/1000 times that of a normal human hair, can effectively filter these tiny aerosols. NFT, organized in four sections – fundamentals, deep understanding, technologies, and application, covering comprehensively on the subject, is a valuable resource for undergraduates and graduates, engineers, researchers and practitioners in related industries. - Describes technologies with insight and use basic engineering principles to build-up technologies - Includes extensive clear and understandable figures and tables to enhance key concepts - Uses examples throughout to explain engineering principles and interdisciplinary concepts - The only book in the market focusing on nanofiber filter technologies for filtering submicron aerosols and nanoaerosols

Table of contents

• Cover image
• Title page
• Table of Contents
• Copyright
• In God, I trust
• Preface
• Chapter one. Introduction to submicron aerosols and nanoaerosols
• Chapter two. Fundamentals of gas filtration of submicron aerosols and nanoaerosols
• Chapter three. Nanofiber production
• Chapter four. Filter testing, filter test standards, and filter ratings
• Chapter five. Filtration characteristics of nanofiber filter and multilayer nanofiber filter for depth filtration
• Chapter six. Transition from depth-to-surface filtration for a nanofiber filter
• Chapter seven. Cake filtration with a composite micro–nanofiber filter
• Chapter eight. Electret filter for depth and cake filtration
• Chapter nine. Numerical modeling of aerosol filtration using a nanofiber filter
• Chapter ten. Cleaning of nanofiber filter
• Chapter eleven. Nanofiber filter reuse—repeated loading–cleaning cycles
• Chapter twelve. Filtration of ambient aerosols
• Chapter thirteen. Applications of nanofiber filters
• Chapter fourteen. Outlook
• Appendix A. Answer to problems of chapters
• Appendix B. Size distribution in dN/d(log(Dp))
• Appendix C. Permeability and capillary radius of the skin layer
• Appendix D. Cake deposition-resistance ratio, β
• Appendix E. Specific filter resistance, γ
• Nomenclature
• Index