Name: Faiza Ehsan

M.Sc 4th Semester

University of Agriculture Faisalabad

from WASTE to VALUE

A Greenhouse Gas

The most highly oxidized molecule..

O

OC

Where

Humanity’s CO2

come from....

Volcanic eruptions..

Deforestation

Land use change

Industrial processes...

Where Humanity’s

CO2 goes..

Plants

Oceans

‘‘If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggest that CO2

will need to be reduced from current levels to at most 350 ppm.”

Dr. James Hansen

World Glacier Monitoring Service

Sea level rise..

Impact on Animals..

Need to reduce CO2 levels in the atmosphere!!

Turning CO2 to useful compounds

818.5 kJ/mol

CO2 to Fuels

Solar Energy

Wind Energy

Hydro electric

Sources of Energy

CO 2(g) + 2H +(aq) + 2e - CO (g ) + H 2O ( l )

CO 2(g) + 8H +(aq) + 8e - CH 4(g) + 2H 2O ( l )

2CO 2(g) +12H +(aq)+ 12e - C 2H 4(g) + 4H 2O ( l )

2CO 2(g) + 6H +(aq)+ 6e - CH 3OH ( l ) + H 2O ( l )

CO 2(g) + 2H +(aq) + 2e - HCOOH (aq)

2H + + 2e - H 2(g)

Industrial Utilization of CO2

MeOH

inorganic carbonates

urea

salicylic acid

ethylene carbonate

methanol

e.g., Na2CO3 and BaCO3

Polyethylene carbonate

PolyurethanePolypropylene carbonate

CO2 to Building materials

Cement&Concrete

Brent Constanz

http://www.sciam.com/article.cfm?id=cement-from-carbon-dioxide

Can recycling of

CO2 solve the raw

material and climate

problems of

humanity?

THANK YOU

Any Confusion..?