Low-Temperature Methanol Wash AGR (Rectisol) Simplified PFD | Credit:  National Energy Technology Laboratory

Low-temperature methanol wash is a physical acid gas removal (AGR) process that uses refrigerated methanol as a solvent to separate acid gases—primarily CO₂ and H₂S—from industrial gas streams at subzero temperatures. The technology was pioneered in the 1950s when Linde Aktiengesellschaft (Munich, Germany) and Lurgi Mineralöltechnik (Frankfurt, Germany) developed this technology marketed under the Rectisol^® trademark.​

 

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