shenzhen middle school reporter: xueli chen, zichen lee, shing chi ian wang karst carbon...
TRANSCRIPT
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SHENZHEN MIDDLE SCHOOL
Reporter: Xueli Chen, Zichen Lee, Shing Chi Ian Wang
Karst Carbon Sequestration
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Solutions—— 1 Improving terminal efficiency ; 2 Improving supplier efficiency ; 3 Renewable energy ; 4 Alternative fuels ; 5 Agriculture ( CH4 and N2O reduction projec
t ); 6 Industrial reduction process ;
—— 《 United Nations Framework Convention on Climate Change 》
7 CCS
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3.Karst Carbon Sequestration
Carbon Capture and Sequestration ( CCS )——
2.Plantation Sequestration
1.Ocean Sequestration
technology attempting to prevent the release of large quantities of CO2 into the atmosphere from fossil fuel use in power generation and other industries by capturing CO2, transporting it and ultimately, pumping it into underground geologic formations to securely store it away from the atmosphere.
——Wikipedia
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Why we choose this topic?
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1.China is a big country with vast Karst
2.Nearly 15% of the land on Earth is covered by Karst.
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What is it?And why do we call it “Karst”?—— Karst topography is a geological formationshaped by the dissolution of a layer or layers ofsoluble bedrock, usually carbonate rock suchas limestone or dolomite.
It has a simple principle——
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Climate
Hydrogeology Geological Conditions
Influencing factors:
Vegetation
Landuse
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For a long time, it was generally accepted that the geological carbon sink rate was very small, thus its effect was not considered seriously in the global carbon cycle study.
However, According to statistics, Karst carbon sequestration could absorb over 600 million tons of carbon dioxide per year which takes over 33% percent of the world’s carbon dioxide
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Problems
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1. The stability of carbonate rock
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Estimation of carbon sink flux by karstification
Lithology Specific corrodibility (%)
• Dolomite 0.505 • Dolomitic limestone 0.833 • Impure dolomite 0.767 • Limestone 0.965
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Limestone
Dolomite
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2.Speed( carbon capacity)
Carbonic Anhydrase
Limestone ——10times Dolomite ——3times
Origin?
expensive
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Thank you for your listening!
Any question?