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

CONTENTS Introduction 1 Forming conditions and distribution 2 3 Advantages 4 The methods of exploitation 5 The future road

1 Introduction

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

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

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:

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

Forming conditions and distribution 2 Forming conditions and distribution

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

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

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

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

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3 Advantages

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

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.

4 Exploiting methods

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

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

Geological disaster submarine slide tsunami

5 Future road