OCR AS Chemistry F332: Controlling Carbon Dioxide

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Controlling Carbon Dioxide
Carbon dioxide is the greenhouse gas causing most concern.
Increased carbon dioxide emissions could upset the existing balance in the
Four possible approaches to the control and reduction of atmospheric carbon dioxide
Approach 1 Choose the right fuel
Approach 2 Economise on the use of energy in general
Approach 3 Dispose of the carbon dioxide
Approach 4 Encourage photosynthesis

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Approach 1: Choose the Right Fuel
Producing more energy from renewable sources and using fuels with lower carbon contents are ways
to reduce carbon emissions.
Fuel Sustainability Availability Effects on
Hydrogen Least efficient and Most abundant Can be pollution free
most expensive resource. Can be and infinitely
possible replacements produced from renewable. However
for petrol in terms of renewable resources. the process of
reducing greenhouse obtaining hydrogen
gases. will release carbon
Methane Produces low levels of Not yet widely Combustion of
carbon dioxide.…read more

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Approach 2: Economise on the use of energy in
in general
Energy efficiency is the quickest, cheapest and cleanest way to address the linked
issues of air pollution.
This graph shows the world energy consumption from 1986 to 2011.
The figures show that overall energy consumption is growing, rising by 2.5 per cent in 2011. This is
less than in 2010, when consumption rose by 5.…read more

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Solutions to lower energy consumption:
Unplugging unused Uses less energy No fuel burnt
appliances Less carbon emissions
Turning off lights Uses less energy No fuel burnt
Less carbon emissions
Energy saving light bulbs They dont use as much Reduce amount of fuel
energy as regular light needed and carbon
bulbs emissions
Hybrid vehicles Uses electrical energy as a Less carbon emissions
Renewable energy Replaces the use of fossil Can be expensive but less
fuels. Cheaper energy. fuel is required and the
More efficient.…read more

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Approach 3: Dispose of the Carbon Dioxide
CCS ­ Carbon Capture and Sequestration is a method used to dispose of carbon dioxide, retrieving it
from existing fossil fuel power pants. It is transported to a storage site where it in then deposited
where it will not re-enter into the atmosphere. It aims to reduce large quantities of CO2 into the
atmosphere.…read more

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Approach 4: Encourage Photosynthesis
Photosynthesis removes carbon dioxide from the atmosphere, converting it to carbohydrate and
Removing atmospheric carbon dioxide levels can be achieved by planting native trees on scarcely
vegetated land and by preserving forests. Trees remove or sequester carbon dioxide from the
atmosphere during photosynthesis and return oxygen back to the atmosphere. Trees are reffered to
as carbon sinks as the carbon dioxide retrieved from the atmosphere is stored as cellulose in their
trunk, branches, leaves and roots.…read more

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Splitting water requires an energy input of about 2.5 volts. This means the process
requires a catalyst. The catalyst reacts with the sun's photons to initiate a chemical reaction.
Using photosynthesis as a main control of CO2 levels is in place in countries such as America. U.S.
forests and agricultural soils accounted for a significant removal of CO 2 from the atmosphere,
representing 11 percent of total gross U.S. CO 2 emissions in 2000.…read more


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