shenzhen middle school reporter: xueli chen, zichen lee, shing chi ian wang karst carbon...

SHENZHEN MIDDLE SCHOOL

Reporter: Xueli Chen, Zichen Lee, Shing Chi Ian Wang

Karst Carbon Sequestration

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

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

Why we choose this topic?

1.China is a big country with vast Karst

2.Nearly 15% of the land on Earth is covered by Karst.

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——

Climate

Hydrogeology Geological Conditions

Influencing factors:

Vegetation

Landuse

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

Problems

1. The stability of carbonate rock

Estimation of carbon sink flux by karstification

Lithology Specific corrodibility (%)

• Dolomite 0.505 • Dolomitic limestone 0.833 • Impure dolomite 0.767 • Limestone 0.965

Limestone

Dolomite

2.Speed( carbon capacity)

Carbonic Anhydrase

Limestone ——10times Dolomite ——3times

Origin?

expensive

Thank you for your listening!

Any question?