PRE-COMBUSTION CARBON CAPTURING
As the name suggests, the pre-combustion capture process occurs prior to the
combustion process. During the first stage, the hydrocarbon fuel is converted
into carbon monoxide and hydrogen, thereby forming a synthesis gas. The second
step involves a shift conversion reaction where carbon monoxide gas is converted
to carbon dioxide. In the third stage, the carbon dioxide is separated and
compressed, leaving the hydrogen available for “clean” combustion or feed stock
for chemical production.
Features
- Pre-combustion capture can be implemented in natural gas reformers.
- This process is also applicable to fossil fuel fired Integrated Gasification
Combined Cycle (IGCC)
Advantages
- High carbon capture recorded (90—95%).
- Lowest technology risk involved.
- High concentration of carbon dioxide gas at high pressure results in lower
volumes, less powerful solvents, less restoration energy thereby reducing cost.
- Increases opportunities for furthering the hydrogen energy sector.
Disadvantages
- Results in high NOx emissions requiring expensive scrubbing technology.
- Requires a high investment dedicated reaction / separation train upstream of
gas turbine.
- Hydrogen combusting turbine efficiency is lower than conventional turbines.
How can HGA engineer your pre-combustion carbon capture system?
- We can perform an on-site analysis of your system
- HGA is routinely engaged in front end engineering design (FEED). We can
survey your existing technology and recommend solutions.
- We manage projects from inception to operation.
