Recent studies have found that Supercritical carbon dioxide can flush out oil from depleting wells.
The purpose of the Supercritical Carbon Dioxide (sCO2) Technology Team is to use a collaborative approach to develop and facilitate commercialization of sCO2 energy conversion technology.
Within the Department of Energy (DOE), SCO2 Brayton Cycle energy conversion could benefit research and development efforts in the offices of Nuclear Energy, Fossil Energy and Energy Efficiency and Renewable Energy. The Tech Team members draw from each of these programs and work together to achieve the highest efficiencies offered by the sCO2 Brayton Cycle technology (compared to the widely-used steam turbine Rankin Cycle.)
About Supercritical carbon dioxide:-
- Supercritical carbon dioxide (CO2) is a fluid state of CO2 where it is heated and held at or above its critical temperature(31∘C) and pressure(73 atm).
- In this supercritical phase, CO2 exhibits properties and behaviours between that of a liquid and a gas.
- Supercritical CO2 possesses liquid-like densities with gas-like diffusivity, surface tension and viscosity.
Use of Supercritical Carbon Dioxide (CO2):-
- It is used in the oil and gas industry for gas injections during enhanced oil recovery (EOR) techniques.
- When supercritical CO2 reacts with water, carbonic acid (H2CO3) is formed.
- Carbonic acid lowers the pH in the reserve and creates an environment that is corrosive to metal equipment.
BENEFITS OF THE SCO2 BRAYTON CYCLE FOR ENERGY PRODUCTION ECONOMIC AND ENVIRONMENTAL BENEFITS OF THE TECHNOLOGY INCLUDE:
- Broad applicability to variety of heat sources
- Higher plant efficiency
- Reduced fuel consumption and emissions
- Low cooling water consumption
- Compact design/footprint lowers capital cost
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