Turning Atmospheric CO2 Into Carbon Nanofibers Could Reduce

Global Warming

by Phiphut Chaiyadad 5505155

Outline

Introduction -gas carbon dioxide -carbon nanofiber -electrolysis

Methods -methods -chemical process -results Conclusion

http://thesource.com/2015/06/06/study-shows-no-slowdown-in-global-warming/

Carbon dioxide Gas

http://co2now.org/Current-CO2/CO2-Now/global-carbon-emissions.html

http://co2now.org/Current-CO2/CO2-Now/global-carbon-emissions.html

Carbon dioxide Gas

https://en.wikipedia.org/wiki/Global_warming_in_the_Arctic

https://totheendofhope.wordpress.com/2014/02/04/shell-freezes-arctic-drilling-plans-for-2014/

CARBON NANOFIBERS Carbon nanofibers (CNFs) are cylindric nanostructures with graphene layers arranged as stacked cones, cups or plates. Carbon nanofibers with graphene layers wrapped into perfect cylinders are called carbon nanotubes.

CARBON NANOFIBERS

CARBON NANOTUBE

CARBON NANOFIBERS application

Composite materials Ex. Boeing Dreamliner ,sports equipment, wind turbine blades etc.

Scanning probe microscopy tips Field electron emission sources Carrier material for various catalysts in petrochemistry Electrode material Oil spill remediation

CARBON NANOFIBERS Price : US 500 - 700 $/Kilograms

ELECTROLYSIS electrolysis is a technique that uses a direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially highly important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential.

ELECTROLYSIS

METHODS

Anode(Ni or Ir)

Cathode (steel)

Ni crucible

Electrolyte : 730 ฺC molten lithium carbonate (Li2CO3) Current Density : 0.05A - 1A / cm2

Voltage : 0.5 V - 1.5 V

Chemical Process

CO2(atmospheric)+ Li2O(dissolved) Li2CO3(molten) (1)

Li2CO3(molten) C(solid)+ Li2O(dissolved)+ O2(gas) (2)

CO2(atmospheric) C(solid) + O2(gas) (3) For a net reaction with eq 1:

low initial current : No (0.05 A) added 6 m Li2O to electrolyte : Yes added metal(Ni ,Co or Cu) oxide to electrolyte : No No carbon nanofibers

low initial current : Yes (0.05 A) added metal(Ni ,Co or Cu) oxide to electrolyte : No added 6 m Li2O to electrolyte : No spherical carbon (1 micron)

low initial current : Yes (0.05 A) added metal(Ni ,Co or Cu) oxide to electrolyte : yes added 6 m Li2O to electrolyte : Yes High yield, uniform, but tanged CNFS

low initial current : Yes (0.05 A) added metal(Ni ,Co or Cu) oxide to electrolyte : yes added 6 m Li2O to electrolyte : No High yield, uniform, straight CNFS

CONCLUSIONS

CONCLUSIONS

"We calculate that with a physical area less than 10 percent the size of the Sahara Desert, our process could remove enough CO2 to decrease atmospheric levels to those of the pre-industrial revolution within 10 years," he says.

REFERENCES 1. One-Pot Synthesis of Carbon Nanofibers from CO2 Jiawen Ren,† Fang-

Fang Li,† Jason Lau,† Luis Gonzalez-Urbina, ́ † an tuuatu Lihtu*,† † Department of Chemistry, The George Washington University, Washington, DC 20052, United States

2. https://en.wikipedia.org/wiki/Carbon_nanofiber 3. http://co2now.org/Current-CO2/CO2-Now/global-carbon-emissions.html

THANK YOU FOR

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