By reducing the finished natural gas from 25 MPa to ~0.8 MPa for regeneration, the regenerated gas is then returned to the compressor inlet. During regeneration, the compressor must be in operation, and the running time must be between 6 to 8 hours.

Using a small-scale scroll compressor as the circulation power source, conducting isobaric closed-loop heating regeneration without the need to release pressure inside the tower, saving resources and protecting the environment, reducing the gas loss of CNG refueling stations, and truly achieving zero emissions. There is no significant pressure change during the regeneration switch, which minimizes the impact on valves and molecular sieves.