mruby
Civil/Environmental
- Sep 11, 2005
- 5
There was considerable discussion of sulfides control in an exhaust gas stream in thread127-72509 but the specific subject of methyl mercaptan remains illusive. We are trying to control methyl mercaptan using a two-stage scrubber - first stage is acid and second stage is caustic with NaOH/ClO2 (see thread127-157289 for details). Methyl mercaptan cuts through both like a hot knife through butter. The alternatives we are looking into are replacement of the oxidizer in either the caustic or the acid scrubber (if we used the acid scrubber we would raise the pH to about 4.5) with a proprietary hydrogen peroxide plus catalyst solution or with potassium permanganate. We have had real difficulty finding anyone who has successfully controlled methyl mercaptan using wet scrubbing. Papers in the literature seem to be all over the map as to the correct pH for max solubility. Would appreciate any comments on the alternative scrubbing solutions that might be successful.