An adsorptive membrane is a type of membrane that utilizes an adsorbent material to selectively remove one gas from a gas mixture. The adsorbent material is coated onto the surface of the membrane, creating a thin layer that is capable of adsorbing one gas molecule while allowing the non-interacting gas molecules to pass through the membrane. This results in the separation of the two gases, with the adsorbed gas sticking to the membrane while the non-adsorbed gas passes through.

The working principle of an adsorptive membrane is based on the interaction between the gas molecules and the adsorbent material. The adsorbent material is typically a porous material with a high surface area, allowing it to adsorb large quantities of gas molecules. When a gas mixture is passed over the membrane, one of the gases in the mixture will interact with the adsorbent material and be held on the surface of the membrane, while the non-interacting gas molecules will pass through the membrane.

This process is highly selective and can be tuned to remove specific gases from a gas mixture, making it a powerful tool for gas separation and purification. Additionally, the use of a membrane allows for the separation to occur in a continuous flow process, enabling efficient and cost-effective gas separation.

It's worth noting that there are several different types of adsorptive membranes, each with their own unique working principles and materials. The particular design mentioned in the prompt may be a patented version of this technology, indicating that it has undergone significant development and refinement to optimize its performance.