CRYOGENIC SEPARATION
Cryogenic separation is distillation process occur at very cold temperatures. This process occurred at specific condition and distillation process requires two phase, liquid and gas. This high purity of nitrogen can be achieved by using this process. The air will be compress until 10 bar, then it will be cooling until it become liquefy. When the pressure is high, the bubble point of compound will be increase. So, it save energy to liquefy the air.
To achieve low temperature in distillation column requires refrigeration cycle by means Joule-Thomson Effect. Joule-Thomson effect is the gas with high pressure has dropping the pressure instantly causing the temperature drop. When the gas in high pressure flow in pipeline, then go to distillation column (large area) causing the temperature drop. Then refrigeration cycle start until the component with high boiling point become liquid. The liquid phase will be at the bottom of distillation column as bottom product.