Let's explain how oxy-combustion technology works
by Alstom Power.
Oxy-combustion consists of burning fossil fuel in a mixture of oxygen, produced in and Air Separation Unit (ASU) and re-circulated flue gas, resulting in a flue-gas rich in CO2 (free of nitrogen, contrary to conventional fossil-fuel power plants).
The pure oxygen is supplied by a cryogenic Air Separation Unit (ASU) which is a mature technology supplied by numerous international companies worldwide.
The oxy-combustion boiler, has been the "heart" of oxy-combustion technology development at Alstom for more than a decade. Starting with research and laboratory pilot in the 1990's, we have now fully validated the pilot-scale phase.
Alstom has also a comprehensive development programme for the Gas Processing Unit (GPU) ; its function is to further treat and process the flue gas downstream of the oxy-boiler to deliver CO2 at the required specification for its transport and storage. As part of the validation programme, a mobile pilot unit has been built to be tested under multiple oxy configurations.
Alstom is proposing an integrated approach of oxy-combustion aiming at optimizing both economic and technical deliverables of the oxy power plants.
Watch the video to learn more about this robust and competitive solution:
Key features of oxy-combustion CCS technology
- All boiler configurations and firing systems eligible (conventional boilers, tower type and 2-pass as well as CFB)
- A robust technology (main subsystems proven and.or developed from existing processes)
- Large range of possible fuels (coal, lignite, biomass, wastes, fuel oil, natural gas)
- CO2 purity optimized for each projects (typical 95% or up to 99.9% when required)
- Offer options for improved operational flexibility