Membrane-based technology for recovering CO2 from flue gas
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Flue gas has high temperature and low pressure; using membrane separation requires pressurization, which inevitably increases costs. Is there any potential for this approach?
May I ask: How is the manufacturing process carried out? Can’t it be achieved using membrane technology?
Look for a few literature reviews on membrane separation for removing carbon dioxide from flue gas.
The CO2 separation process is generally carried out after dust removal and desulfurization; by this point, the temperature of the flue gas has already dropped to 30-60 degrees, so the temperature isn’t very high. However, the pressure is indeed low. In the case of membrane separation, it is necessary to increase the pressure, which raises the costs. Currently, CO2 capture from power plant exhaust gases still relies on liquid ammonia absorption after combustion, but membrane separation is a very promising area of research.
It is not economical. It is possible to remove carbon dioxide from blast furnace gas by comparing various energy consumption aspects, but it is not cost-effective; the key issue is the need for pressure increase, which results in high energy consumption.
Membrane separation is currently very popular and seems to have great prospects; it can also be combined with chemical absorption methods, offering significant room for development. Additionally, both the energy consumption associated with membrane separation and the membrane materials used still need further improvement
For the flue gases from oxygen-enriched combustion, membrane methods can be considered.
Flue gas is so dirty, with dust and other particles, which can easily contaminate the membrane, making it unsuitable.