Application of a Zeolite Membrane for the Post-Combustion CO2 Capture

It is estimated that CO₂ emissions from power plants accounts for about one-quarter of total CO₂ emissions. Therefore, developing cost-effective CO₂ capture technologies for existing power plants is receiving tremendous attention in recent years. A novel process based on the application of a zeolite membrane has been proposed for post combustion CO₂ capture using aqueous ammonia solution. The membrane separation occurs between the absorber and regenerator (stripper) increasing carbon loading in the permeate stream. It is believed that this new process can decrease the consumption of energy in the stripper primarily through higher solution carbon loading. A zeolite membrane with high separation performance has been prepared in this work. The related results showed that the carbon loading in the permeate side of the membrane is concentrated. The rejection rate of total carbon loading is higher than -50%.