- WATER TREATMENT
- WASTEWATER TREATMENT
- AIR POLLUTANT &
- OIL & GAS DRILLING
- POWER PLANT
The flue gases from coal-fired power plants contain considerable amounts of CO2. This greenhouse gas can be captured. Researchers and industry are testing various methods for this. UNICARB TCH200 is used to capture CO2 in a Coal-Fired Power Plant and then separated again using heat.
During the first sub-process, UNICARB TCH200 binds the CO2 in a fluidized bed reactor. This frees a large amount of heat, which is then available for the power plant process. The CO2-free flue gas is then released into the atmosphere. In the second sub-process, the CO2 bound in the resulting calcium carbonate is separated in a pure oxygen atmosphere by supplying heat and can then be recycled or stored geologically. The strengths of calcium carbonate looping include the low costs with a 90% capture rate. This is due to the lower efficiency losses in comparison with other methods. Existing power plants can be retrofitted with carbonate looping.
Re-mineralization by Calcium Addition
Most seawater and brackish water desalination plants today typically add only calcium to the desalinated water in the form of lime, because this chemical is usually readily available as a commercial product and is less expensive to use for achieving the same target level of total water hardness as compared to using magnesium salts. Calcium remineralization is needed because magnesium alone cannot provide adequate corrosion protection. Over 90 % of the existing seawater desalination plants worldwide use a sequential feed hydrated lime and carbon dioxide to supply hardness and alkalinity.