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A new study published in Nature Energy shows that compared with trying to capture carbon from fossil fuel power stations, solar panels and wind turbines combined with energy storage provide better prospects for combating climate change .
Carbon capture technology-a new or untapped technology for capturing carbon dioxide emissions from coal and gas-fired power stations-plays an important role as a basic model for international agreements to address climate change issues, such as the 2015 Paris Climate Change Agreement .
However, new research shows that resources that will be used to develop and install carbon capture technologies, invest in manufacturing more solar panels and wind turbines, and focus on developing energy storage facilities that support these technologies are better options.
International research teams from Lancaster University, Khalifa University, Clemson University, UiT Arctic University and the University of Florence have considered the energy required to create and operate the system and calculated the carbon of various fossil fuel power stations Energy output after capture technology-including coal and natural gas.
They compared these results with the energy return of renewable energy systems (such as wind farms and solar panels), and combined various energy storage systems, such as batteries, hydrogen, or hydropower, and found that the most Examples of bad renewable energy, and the best examples of carbon capture.
The researchers calculated that this is partly due to the net energy loss caused by the implementation of carbon capture-including the loss of energy required to build and then operate the carbon capture and storage process. In addition, pipelines, compressors, and other equipment required to capture and store carbon also require energy to produce. This is called built-in energy.
All of this reduces the net energy output of power plants that implement carbon capture.
The energy return of investing in wind turbines and solar panels depends on the energy costs of the panels and turbines themselves, as well as whether there is sufficient sunlight or wind in the places where these panels and turbines are installed.
However, even moderately efficient renewable energy regions provide better energy returns than most carbon capture technologies.
Dr. Denes Csala, a lecturer in energy storage and system dynamics at Lancaster University and co-author of the study, said: From a positive perspective, invest existing resources directly in the construction of new Renewable energy and storage capacity, rather than building new fossil fuel power stations and combining carbon capture technology, will be more valuable.
Investing in renewable energy has a higher net energy return rate, making it more likely to achieve emissions targets without facing the risk of reduced energy supply due to reduced fossil fuel supply and climate-constrained emission budgets.
Given its net energy disadvantages, carbon capture and storage should be viewed as a niche and complementary contributor to the energy system, rather than as a key technology option as the current climate agreement suggests.
(Originally from: Daily Science China New Energy Network Synthesis)
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