11:00 〜 13:00
[AGE31-P06] Strategic Considerations for the Development of Carbon Neutral Technologies Based on
CO2 Emissions by Source
キーワード：二酸化炭素排出、カーボンニュートラル、ネガティブエミッション
There are both natural and human sources of carbon dioxide (CO2) emissions. Natural sources of atmospheric CO2 include ocean release, volcanic eruption, weathering of carbonate rocks, decomposition of vegetation and other biomass, and respiration. Human sources of CO2 emissions mainly include those released from burning of coal, oil, and natural gas, as well as deforestation.
It is known that human sources of CO2 emissions have been growing since the industrial revolution. In recent years, the annual global CO2 emissions reached about 40Gt, among which about 87% of human source CO2 emissions come from the burning of fossil fuels (i.e., coal, oil, and natural gas), 9% from changes in land use including clearing of forests, and 4% from some other industrial processes such as cement manufacturing.
Since natural processes can not be controlled by humans, the basic consideration for reducing the emissions of CO2 to atmosphere is to control the CO2 emissions induced by human activities. In fact, power generation and transport accounted for more than two third of total emissions in 2019, and the remaining one third was mainly associated with the industry and building sectors. One of the most import strategies should be the use of carbon-free and carbon-neutral energy sources, such as renewable energies, synthetic fuels made by renewable energies, and biomass.
Renewable energy, often referred to as clean energy, comes from natural sources or processes. A variety of renewable energies, such as solar energy, wind energy, geothermal energy, and hydraulic energy can be used, but are often constrained by natural conditions. Innovative technologies associated with energy storage are also of fundamental necessity.
The development of renewable energy, the manufacture of carbon-free fuels, and any other human activities also need energies which indirectly induce the emission of CO2. To achieve carbon neutrality, carbon dioxide capture and storage (CCS), especially the development of negative emission technologies are the key to achieving the goal. An in-depth discussion on related technologies will be given in this presentation.
It is known that human sources of CO2 emissions have been growing since the industrial revolution. In recent years, the annual global CO2 emissions reached about 40Gt, among which about 87% of human source CO2 emissions come from the burning of fossil fuels (i.e., coal, oil, and natural gas), 9% from changes in land use including clearing of forests, and 4% from some other industrial processes such as cement manufacturing.
Since natural processes can not be controlled by humans, the basic consideration for reducing the emissions of CO2 to atmosphere is to control the CO2 emissions induced by human activities. In fact, power generation and transport accounted for more than two third of total emissions in 2019, and the remaining one third was mainly associated with the industry and building sectors. One of the most import strategies should be the use of carbon-free and carbon-neutral energy sources, such as renewable energies, synthetic fuels made by renewable energies, and biomass.
Renewable energy, often referred to as clean energy, comes from natural sources or processes. A variety of renewable energies, such as solar energy, wind energy, geothermal energy, and hydraulic energy can be used, but are often constrained by natural conditions. Innovative technologies associated with energy storage are also of fundamental necessity.
The development of renewable energy, the manufacture of carbon-free fuels, and any other human activities also need energies which indirectly induce the emission of CO2. To achieve carbon neutrality, carbon dioxide capture and storage (CCS), especially the development of negative emission technologies are the key to achieving the goal. An in-depth discussion on related technologies will be given in this presentation.