Gas storage in metal organic frameworks. 1. Metal organic frameworks has surface area more than 40 tennis courts per gram. So, it has high adsorption capacity. 2. Gas storage in a cylinder filled with MOFs can store much more gas than empty cylinder. 3. Apart from storage ,MOFs can also be used for Gas Separation.

1. Gas Storage in Metal-
Organic Frameworks
Nitish Kumar
APE UP (2015-2019)
University of petroleum and energy studies, Dehradun
Uttarakhand, India
MOFs

2. Content
 Introduction
 Environmental Issues
 Solution
 Synthesis
 Application
 Conclusion

3. INTRODUCTION
 DEFINITION
 Metal-organic frameworks (MOFs) are a new class of ultra porous, highly crystalline
materials linking inorganic and organic units by stong linking bonds or linkers.
 It has
 world record in large surface area ( i.e. from 100 to over 6000 m2 g-1)
 pore size (i.e. 0.2 to 3.8 nm) and
 lower densities (i.e. 1.00 to 0.09 g cm-3).
 Highly Flexible
 High Tunability

4. Example - UiO-66 is an archetypal zirconium-based metal–organic
framework (MOF)

5. 1. Relation with Environment
 Green House Effect
Main greenhouse
effect causing gases
are
• Carbon dioxide
• Methane

6. Solution
 Carbon Capture and sequestration
 The structural tunability and flexibility of MOFs helps in
easy selective adsorption of Carbon dioxde at room
temperature.
 Desorption can be done by heating
“MOFs have been identified as the most promising next-generation technology
for carbon capture.”
US Department of Energy

7. 2.Relation with Environment
 Air pollution
 According to the WHO, Air pollution in India is estimated to kill 1.5
million people from chronic respiratory diseases and asthma every
year.
 In November 2017, in an event known as the Great smog of Delhi, it
was found out that
Levels of PM2.5 and PM 10 (particulate matter) hit 999 micrograms
per cubic meter,
while the safe limits = 60 and 100 respectively.
 Low visibility has resulted in accidents across the city, notably a 24
vehicle pile-up on the Yamuna Expressway.

8. 2.Solution
 Fine particles capture through electrostatic adsorption by MOFs.
 According to a study published in Nature journal , the MOFs can filter up to
99.5% of PM 2.5 and PM 10 in lab tests.
(PM 2.5 and PM 10 are small particles less than 2.5 and 10 micrometers in
diameter respectively. )
 Under the irradiation of visible light, MOFs leads to sunlight catalysis,
decomposing harmful organic matter into carbon dioxide and water, which
makes the filtration efficiency sustained, long-lasting and without secondary
pollution.

9. Applications
 Gas Separation
 Gas storage (hydrogen , methane)
 Carbon Dioxide capture separation of CO2 from flue gas.
 MOFs have adsorption properties and can increase the
performance of heat exchanging systems i.e. in industrial
cooling systems.

10. Other APPLICATIONS
 Apart from all this the MOF have several number of applications like-
 Hydrogen and methane storage
 Selective gas adsorption .
 Catalysis due to active metal sites
 And researches is still going…….

11. Conclusion
 MOFs is one of the best solution to cope with pollution issues ,notably in
Delhi.
 In future ,Cars and Chimneys with inbuilt MOFs may directly adsorb carbon
dioxde from the exhaust.
 Open metal site MOFs preferentially adsorb carbon dioxide over nitrogen or
methane
 Catalysis due to active metal sites
And researches is still going…….

12. Thank you