What is the scope of application for various separation and purification techniques?

Pressure Swing Adsorption (PSA for short) is a new type of gas adsorption and separation technology, which has the following advantages: (1) High product purity. ⑵It can generally operate at room temperature and under low pressure; no heating is required during bed regeneration, making it energy-efficient and cost-effective. ⑶The equipment is simple, with easy operation and maintenance. ⑷Continuous cyclic operation can achieve complete automation. Therefore, when this new technology emerged, it attracted the attention of industries around the world, which competed to develop and research it; as a result, it developed rapidly and became increasingly mature. It is widely used for gas purification and separation, such as separating nitrogen from oxygen in air, purifying methane, purifying hydrogen, etc. This is just my personal opinion, and it may not be comprehensive