Presented by:

Deynum Jagaba

A00011702

Geothermal energy is thermal energy generated and stored in the Earth

Heat from the earth can be used as an energy source in many ways, from large and complex power stations to small and relatively simple pumping systems

 Many regions of the world are already tapping geothermal energy as an affordable and sustainable solution to reducing dependence on fossil fuels

The amount of heat within 10,000 meters (about 33,000 feet) of Earth's surface contains 50,000 times more energy than all the oil and natural gas resources in the world. 

The areas with the highest underground temperatures are in regions with active or geologically young volcanoes.

These "hot spots" occur at plate boundaries or at places where the crust is thin enough to let the heat through

You only need to dig 6-8 feet deep.

1. How can we control the temperature?

2. How can we control the emission of H2S and CO2?

3. How we can use this form of energy without worrying about environmental degration?

To use heat from the earths interior to produce energy.

Producing Energy

Completely clean energy

Completely renewable. The Earth is never going to run out of heat.

Completely renewable. The Earth is never going to run out of heat.

Low cost to operate and maintain. Since you’re not paying for non-renewable things like oil and natural gas, there are few costs involved with keeping the geothermal system running.

Air emissions: Geothermal fluids contain dissolved gases which are released into the atmosphere

Subsidence: Extracting geothermal fluids can reduce the pressure in underground reservoirs and cause the land to sink.

The major problem we face when dealing with geothermal energy is the emission of gases when digging the ground.

The gasses include Hydrogen sulfide, methane and carbon dioxide.

These gases are not environmentally friendly and the contribute to global warming

Is a colorless gas whose odor can be compared to that of rotten egg. it is also highly flammable and poisonous.

Reaction with Iron 3 oxide: Fe2O3(s) + H2O(l) + 3 H2S(g) → Fe2S3(s) + 4 H2O(l)

2 Fe2S3(s) + 3 O2(g) + 2 H2O(l) → 2 Fe2O3(s) + 2 H2O(l) + 6 S(s)

Reaction with Bicarbonate: 2Na2HCO3 + 2H2S 2Na2S +2H2CO3

SULPHUR:1. It can be used as a feed stock for fertilizer2. Feed stock of pesticide and herbicide

SODIUM SULFIDE: Sodium Sulfide is a yellow to red solid; readily soluble in water, slightly soluble in alcohol

1. Strong reducing agents2. Used in textile industries as a bleaching

agent3. Used in the production rubber chemicals

Methane (CH4): Methane is the simplest alkane and the major component of crude oil. the best way to get rid of methane is to burn it to produce CO2

CH4 + 3O2 CO2 + 2H2O

Carbon dioxide (CO2): Is an odorless colorless gas that is incombustible.

Reaction with water:CO2 + H2O H2CO3

mimicking photosynthesis. 6CO2 + 6H2O + sunlight -------> C6H12O6 + 6O2

Carbon fixing using CaO2

CO2 + CaO CaCO3

It is added to toothpaste, paper, plastics, paint, tiles, and other materials as both white pigment and a cheap filler.

It can suppress methane explosions in underground coal mines.

Purified, it is added to bread and cereals as a source of calcium.

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