Comparing Different Types of Car Technologies for Environmental Impact
How clean is your
car?
Prepared by the EPSRC CDT in Sustainable Chemistry
•
Renewable source of energy – can be made from plants e.g.
sugar cane
•
Carbon neutral – when the plant grows it uses up carbon
dioxide and the same amount is released when the biofuel is
burned
•
Switching to biofuels would be difficult as most cars would not
be able to run without modification
•
Fossil fuels are needed for the growth, production and transport
of biofuels therefore, they are not completely carbon neutral
•
A large amount of land is required to grow the plants for
biofuels, this land may be better used to grow food
Biofuels
•
Finite supply – non-renewable source of energy
•
Very energy efficient - generates a large amount of energy
through breaking of strong C-C bonds
•
The technology used for producing/burning fossil fuels is well
developed, cheap and easy to use
•
When burned, harmful gasses and particles are released e.g.
unburnt hydrocarbons, CO
2
, CO, SO
x
and NO
x
•
Cause harm to the environment and human health through air,
water and soil pollution
Fossil Fuels
•
No harmful gases or particles are released when used in cars
therefore, it is a “clean” form of energy
•
Very energy efficient – converting most of the energy from
electrical to kinetic
•
The electricity used to power the car may be generated through
burning fossil fuels
•
Compared to cars with an internal combustion engine, electric
cars are very expensive
•
The cars cannot be driven for very long distances as the battery
will run out
Electric
•
Release fewer toxic gases when compared with fossil fuel-only
cars
•
Does not need to be recharged – the battery is charged through
burning the fuel
•
Are expensive and require frequent maintenance
•
Are less powerful than cars with internal combustion engines
•
Use less fuel than a car with an internal combustion engine
Hybrid
•
No toxic gases are produced - use hydrogen and oxygen as
fuels to produce water
•
More efficient than internal combustion engines – they convert
more energy into kinetic energy to move the car
•
They don’t need to be recharged, just need a continuous supply
of hydrogen and oxygen
•
The production, storage and transport of hydrogen is expensive
and complex
•
The infrastructure for providing hydrogen as a fuel on a large
scale does not exist – very few refuelling stations
Fuel Cells
Exploring the environmental impact of various car technologies including biofuels, fossil fuels, electric cars, hybrids, and fuel cells. Each technology has its own advantages and challenges in terms of energy efficiency, emissions, cost, and infrastructure requirements. Biofuels offer a renewable energy source but come with land use concerns, fossil fuels have well-developed technology but emit harmful gases, electric cars are clean but expensive, hybrids offer fuel efficiency but are less powerful, and fuel cells produce no toxic gases but face challenges in hydrogen infrastructure.
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Presentation Transcript
How clean is your car? Prepared by the EPSRC CDT in Sustainable Chemistry
Biofuels Renewable source of energy can be made from plants e.g. sugar cane Carbon neutral when the plant grows it uses up carbon dioxide and the same amount is released when the biofuel is burned Switching to biofuels would be difficult as most cars would not be able to run without modification Fossil fuels are needed for the growth, production and transport of biofuels therefore, they are not completely carbon neutral A large amount of land is required to grow the plants for biofuels, this land may be better used to grow food
Fossil Fuels The technology used for producing/burning fossil fuels is well developed, cheap and easy to use Very energy efficient - generates a large amount of energy through breaking of strong C-C bonds Finite supply non-renewable source of energy When burned, harmful gasses and particles are released e.g. unburnt hydrocarbons, CO2, CO, SOx and NOx Cause harm to the environment and human health through air, water and soil pollution
Electric No harmful gases or particles are released when used in cars therefore, it is a clean form of energy Very energy efficient converting most of the energy from electrical to kinetic The electricity used to power the car may be generated through burning fossil fuels The cars cannot be driven for very long distances as the battery will run out Compared to cars with an internal combustion engine, electric cars are very expensive
Hybrid Use less fuel than a car with an internal combustion engine Release fewer toxic gases when compared with fossil fuel-only cars Does not need to be recharged the battery is charged through burning the fuel Are expensive and require frequent maintenance Are less powerful than cars with internal combustion engines
Fuel Cells No toxic gases are produced - use hydrogen and oxygen as fuels to produce water More efficient than internal combustion engines they convert more energy into kinetic energy to move the car They don t need to be recharged, just need a continuous supply of hydrogen and oxygen The production, storage and transport of hydrogen is expensive and complex The infrastructure for providing hydrogen as a fuel on a large scale does not exist very few refuelling stations
