CO2 Removal from Natural Gas System Using Membranes
A membrane system for gas treating offers an efficient and safe option for carbon dioxide and water vapor removal from gas, particularly in isolated locations. One of the main benefits of the membrane system is that it is highly adaptable to a variety of gas volumes, product-gas specifications, and CO2 concentrations. The greatest efficiency per mcf for product removed can be achieved with a spiral wound cellulose acetate membrane unit when compared to other competitive carbon dioxide removal from gas options.
Membranes for Carbon Dioxide Removal Benefits (CO2)
When a Membrane Separation CO2 Removal System Should be Considered:
CO2 Removal from Gas Process Description
The carbon dioxide removal process using membranes is based on a selective permeation principle. Every gas component features its own specific rate of permeation. The permeation rate is based on the rate that a component is able to dissolve into the surface of the membrane and the speed it disperses within the membrane.
Components featuring a higher permeation rate, including H2, H2s, and CO2, will be able to permeate through the membrane at a faster rate than components that exhibit a lower permeation rate, such as C1, C2, N2, and hydrocarbons of a heavier composition. Methane is not as permeable or fast as carbon dioxide. Once a stream that is comprised of these gases makes contact with the membrane, carbon dioxide will infiltrate the fiber faster than methane. Consequently, the feed stream can be divided into a residual, methane-rich stream on the membrane fiber’s exterior and a permeate carbon dioxide-rich stream on the membrane fiber’s interior.
The separation’s main driving force is the permeating component’s distinct partial pressure. As a result, the difference in pressure between the permeate gas, the feed gas, and the permeating component’s concentration will dictate the purity of the product and the carbon dioxide membrane surface amount that is needed.
Contact Blue Sky Gas today for any CO2 removal from natural gas requirements.