Carbon Sequestration.ppt
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1、Carbon Sequestration,Anjani Kumar CPSP218L Dudash,http:/ Carbon,Chemical element Forms four covalent chemical bonds Comes from latin carbo coal 4th most abundant element on earth Present in all life forms Part of hydrocarbons, which include petrochemicals and fossil fuels,Background-Carbon Cycle,Bac
2、kground-Global Warming,Burning fossil fuels releases greenhouse gases,http:/www.nysforum.org/documents/html/2007/execcommittee/may/enterprisepowerconsumptionreduction_files/images/image6.png,Problem-How to prevent/slow release of CO2 into atmosphere?,Deforestation is responsible for 20% of the world
3、s annual CO2 emissions In 2006, U.S. carbon dioxide emissions from fossil fuel combustion -6.5 billion tonsDeforestation accounts for 25% of emissions of greenhouse gases; Transport and industry account for 14 per cent each.,S,http:/meic.org/images/energy-images/carbon-sequestration/energy-4.jpg/ima
4、ge,Terrestrial Sequestration,Terrestrial carbon sequestration is CO2 from the atmosphere is absorbed by trees, plants and crops through photosynthesis, and stored as carbon in biomass and soils. There are also carbon sinks, which are forests, croplands, and grazing lands. Oceans are the largest carb
5、on sink on Earth 1/3 of human generated emissions are entering the oceanAgriculture and deforestation releases CO2 into the atmosphere and a carbon sink occurs when carbon sequestration is greater than carbon released over time.,Geologic Sequestration,Geologic sequestration of CO2 through well injec
6、tion. Problem of well contamination Water sources could be contaminated as a result Enhanced oil recovery: pumping CO2 into the reservoir “pushes” the oil out U.S is the leader: 32 million tons/year of CO2 use for this purposeEPA announced in October 2007 geologic sequestration projects in the summe
7、r of 2008. Deep saline formations could hold up to 500 billion tonnes of CO2 in the U.S.A. Most are near point sources of CO2 emission.,Carbon Capture and Storage (C.C.S),Carbon Capture and Storage (CCS): Carbon dioxide is captured at its source, including power plants, industrial processes and then
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