1. Yang Shuai from material and science college
Natural gas hydrate
Yang Shuai from material and science college

2. CONTENTS Introduction 1 Forming conditions and distribution 23
Advantages 4
The methods of exploitation 5
The future road

3. 1
Introduction

4. Accidental discovery
In order to transport natural gas,we build the gas pipelines.
However,some pipelines are often blocked by ice strangely.

5. Can ice burn?
Analysing the structure and composition of this ice ,we find it is
a compound of gas and water

6. Definition
Gas hydrate,the crystalline material like ice ,is distributed in deep sea sediments,which is formed by natural gas and water in the high pressure and low temperature pressure: temperature:

7. Structure of gas hydrate
H20 works as a prison to imprison the CH4

8. Forming conditions and distribution2
Forming conditions and distribution

9. Low temperature
·Formation temperature： 0——10℃ ·Decomposition temperature： ＞20℃

10. High pressure
·For example The pressure of generation at 0℃：3×10^6pa ·In the depth of the ocean ,30 atmospheric pressure is very easy to guarantee

11. Gas source
Bacterium can release methane, then the gas was locked into the hydrate ↑ two views ↓ The ocean plate activities

12. The distribution
· Gully basin system · The slope system · The continental margin sea basins · Mud volcano · The deep sea basins · The Arctic permafrost zone

13. LOREM IPSUM DOLOR
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14. Natural hydrate gas resource in China
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15. 3
Advantages

16. easy to storage and transportation
Advantages 1
Huge
reserves 2
High
energy
density 3
Little
pollution 4
rapid
regeneration 5
easy to storage and transportation

17. Huge reserves
The amount of carbon in natural gas hydrate has been proven more than 1×10^13 tons,equivalently 2 times of which in all proven fossil energy,which can meet the human energy demand for demands for 1000 years in future.

18. 4
Exploiting methods

19. LOREM IPSUM DOLOR
tradition:pyrolysis pressure reducing method chemical reagent injection method new: displacement method solid state method

21. Disadvantages
·It is difficult to collect methane system.Porous media at the bottom of the sea is not a mass of rock,but more evenly in distribution.The problem of how to layout pipeline and collect efficiently under the ocean is difficult to solve. ·problems in the process of exploiting

22. Geological disaster submarine slide tsunami

23. 5
Future road