Energy Storing Cryogenic Carbon Capture
نویسنده
چکیده
The Cryogenic Carbon CaptureTM (CCC) process is a retrofit, post-combustion technology that desublimates CO2 in the flue gas and produces a separate liquid CO2 product. This project focuses on the energy-storing version of this process, CCC ESTM. During off-peak hours, CCC ESTM generates more refrigerant than is needed for the process, which is stored in an insulated vessel as a liquid at the low-temperature, low-pressure point in the cycle. During peak demand, the stored refrigerant is used in place of continuously generating refrigerant in a steady-state system. This eliminates nearly all of the energy demand required by CCC for as long as the stored refrigerant lasts. This project 1. shows that natural gas can be used as effectively as other refrigerants in the CCC process; 2. determines that the stored liquefied natural gas (LNG) refrigerant represents a significant portion of the CCC energy demand; 3. calculates that the LNG energy density suffices to be able to store energy at grid scale; 4. develops heat exchanger technologies that allow LNG flow transients to follow energy storage and recovery transients without damage; 5. simulates grid-level incorporation of energy storage into a realistic system; 6. demonstrates as many of these processes as possible at small scale. CCC ESTM operates with the carbon capture portion of the process at a constant load, while the LNG generation portion follows power demand. Power demand on grids with intermittent supplies can change significantly within minutes. SES developed dynamic heat exchangers that can follow changes in flowrates without compromising heat exchanger efficiency or inducing thermal stresses. Detailed analyses demonstrate that a power plantCCC ESTM can manage swings in energy demand on a grid that includes coal, natural gas, wind, and varying daily demands. The revenue generated by storing energy during low-demand, low-cost periods and releasing during high-demand, high-cost periods represents a net revenue that covers 80–90% of the total cost of carbon capture.
منابع مشابه
Membrane-Cryogenic Post-Combustion Carbon Capture of Flue Gases from NGCC
Membrane gas separation for carbon capture has traditionally been focused on high pressure applications, such as pre-combustion capture and natural gas sweetening. Recently a membrane-cryogenic combined process has been shown to be cost competitive for post-combustion capture from coal fired power stations. Here, the membrane-cryogenic combined process is investigated for application to post-co...
متن کاملA Web-Based Data Management and Analysis System for CO2 Capture Process
Fossil fuels constitute a major energy resource for Canada. In 2002 alone, the production of oil, gas and coal contributed over $30 billion to the Canadian economy. Fossil fuel is presently the world’s most abundant, economical and reliable fuel for energy production. However, the industry now faces a major challenge because the production of fossil fuels including coal, crude oil and gas, and ...
متن کاملMaking Carbon Capture and Storage Work
President Obama faces an old challenge of creating a national energy policy. That policy will be designed with multiple objectives in mind. After a year of record oil prices that added to U.S. economic troubles, some want an energy policy that will maintain lower energy prices. With nearly 150,000 troops still in Iraq and tensions raised with Russia over the Georgian invasion, some want an ener...
متن کاملSkid-Scale Cryogenic Carbon Capture
The Cryogenic Carbon CaptureTM (CCC) process is a retrofit, post-combustion technology that desublimates CO2 in the flue gas, separates the resulting solid from the remaining light gases, pressurizes the solid CO2, melts the CO2 and warms the light gas, and completes the CO2 pressurization with liquid CO2. This skid-scale CCC system has demonstrated successful carbon capture of 90–99% from simu...
متن کامل