The presentation is prepared to provide a critical idea on the fundamentals of air purification, CO2 capture, and various methods for air filtration. A colorful texture and design would probably attract more audience to read, learn and share. Have a great day.

1. 04.09.2022|01
L I V E W I T H P U R E A I R
Dr. Debashis Panda
Postdoctoral researcher, VUB, Brussels
Email: pandadebashis7@gmail.com

2. https://en.wikipedia.org/wiki/Air_pollution
02.09.2022|02
DEFINITION OF AIR POLLUTION
• Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful
to the health of living beings, or cause damage to the climate
Air Pollution
Indoor
 Smog
 Particulate
 Greenhouse gases
 Acid rain
Outdoor
 Smoke
 Particulate
 Volatile organic content
Smog Green house gas VOC Smoke

3. Nature Reviews Physics 3, 2021, 300–301
04.09.2022|03
HOW IMPACTFUL TO HEALTH
 0.1 µm particle deposited in alveolar region
 2.5 µm particle deposited in the lung
 10 µm particle deposited in the mouth
 1 µm particle generated in bronchioles
 5 µm particle generated in the larynx
 50 µm particle generated in mouth
10 µm
2.5 µm
0.1 µm

4. https://www.ucsusa.org/resources/each-countrys-share-co2-emissions
04.09.2022|04
AIR POLLUTION & CO2 EMISSION DATA WORLDWIDE
Gwalior, Allahabad, Raipur from India
In 2019, China releases 9.9 GT, USA releases 4.70
GT, and India releases 2.30 GT CO2

5. https://www.britannica.com/technology/air-pollution-control/Scrubbers
04.09.2022|05
TECHNOLOGY FOR AIR PURIFICATION
INDUSTRIAL
Cyclone Scrubber Electrostatic precipitator Fabric filter
• Cyclones are precleaning device, effective to reduce the particle size > 20 µ
• Wet scrubbers used to remove dusts or mists from industrial and chemical processing facilities and
hazardous-waste incinerators (particle size > 8 µ)
• Electrostatic precipitator is a used for removing fine particulates from airstreams by giving electric charge as
they enter the unit and are then removed by the influence of an electric field (particle size ~ 1 µ)
• Fabric filter are one of the most efficient devices for removing suspended particulates, size > 1 µ

6. https://www.britannica.com/technology/air-pollution-control/Scrubbers
04.09.2022|06
TECHNOLOGY FOR AIR PURIFICATION
DOMESTIC
• Aloe Vera, Golden Pothos, Warneck Dracaena, Bamboo Palm, Snake Plant, Indian Basil, Money plants
are used to filter indoor air
• HEPA stands for high efficiency particulate air, and it’s a way of categorizing the quality of air filters built to
remove dust, pollen, pet dander, mold, bacteria, and other airborne particles from indoor air
• HEPA filter are attached to either AC or in Air purifier to filter the air. Once HEPA is clogged with dust, it
cleaned under vacuum pulling or by cleaning with water
Air purifier
Air purifying plant Air conditioner with HEPA filter

7. 04.09.2022|07
TECHNOLOGY FOR CO2 CAPTURE
Point Sources
(Thermal power plants
Cement industries)
CO2
CO2
Distributed Sources
(Automobiles and Populations)
CO2
Accumulation of CO2 in the air
Pre-Combustion
CO2 Capture
Post Combustion
CO2 Capture
Direct Air CO2
Capture
(400 ppm CO2)
(15% CO2, 75% N2)
Atmospheric CO2 concentration has risen dramatically from 278 ppm at the start of the
Industrial Revolution to > 400 ppm today, leads to rise in global temperature

8. 04.09.2022|08
CO2 CAPTURE PROCESS
Modes of CO2 capture
Absorption Cryogenic Membrane
Amine
CO2 Rich
Amine
Heat
Pressure +
Size selective
Pressure
Why Adsorption ? ? Easy regeneration, Simplicity and low-cost intensive
Adsorption
Pressure
+
Pressure
–
Heat

9. Energy Fuels 2021, 35, 16, 12845–12868
04.09.2022|09
ADSORPTION VS. ADSORBENT
 Adsorption: Surface phenomenon principle (intermolecular force of attraction)
 Mode of adsorption: Molecular sieving effect, thermodynamic equilibrium effect, kinetic effect
 Types of adsorption: Physical and Chemical
 Adsorption process: 1. Pressure swing adsorption (PSA) 2. Vacuum swing adsorption
3. Thermal swing adsorption
 Adsorbent: Zeolite, Silica, Activated carbon, MOFS, COFS
 Adsorbent types: Microporous and Mesoporous
 Role of porosity: Adsorbent having ultra-micropore has high chemical potential for CO2
Zeolite MOFs Silica

10. https://climeworks.com/, https://carbonengineering.com/
04.09.2022|10
COMMERCIAL DIRECT AIR CAPTURE TECHNOLOGY
Climeworks, Zürich, Switzerland Carbon Engineering, Canada

11. 04.09.2022|11