May 25, 2018


Based on CRS technology the SDSµ-Purifier extracts and purifies valuable gas components from waste-gases by combining efficient liquefaction and effective separation

CRS Technology

CRS technology (Condensed Rotating Separation) separates components of gases by partial selective liquefaction. Joule-Thompson expansion creates micro-sized droplets that are subsequently removed by RPS.

Novel breakthrough technology which separates components of gases by partial selective condensation. Fast cooling of the mixture using JT-valves or expanders generates micron-sized droplets whereby concentrations of components in gas and droplets are different. The process is completed by removing the droplets from the gas by the Rotational Particle Separator. Applications range from upgrading contaminated natural gas and biogas to removing the greenhouse gas CO2from flue gases of power stations.



  1. Via the Joule-Thompson effect, the feed-gas is first expanded and reduces in pressure and temperature.
  2. With the decrease of temperature and pressure, the mixture gas rapidly enters into the gas-liquid two-phase area from the gas phase, and small droplets are formed in a very short time.
  3. These droplets enter the RPS separator and are separated from the gas phase.
  4. The best operating conditions of CRS process can be determined by analyzing phase diagram.


Recovery and purification of industrial gases

CRS is able to efficiently separate high value products from gases by selective condensation. As such it can be used in many different industries that have waste gas as a by-product.

Below are two examples based real-client on-site gas streams and requirements: