Low-Temperature Methanol Wash Technology (Rectisol) for Syngas Purification
- Technology
- Low-Temperature Methanol Wash AGR
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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Process used to absorb H2S acid gas from raw gas streams resulting from gas shift production units. Efficient process for H2S recovery operating at high pressure (50-60 bar) and low temperatures (between -15 and -30 ºC). I worked with this process for 20 years without any problems and with good cost-efficiency. |
