Mitsui-BF process

The Westvaco process is a dormant, experimental, activated carbon process that has a removal step somewhat similar to that of the Mitsui-BF process, but a regeneration step that does not consume carbon. The sulfuric acid adsorbed on the carbon is reacted with hydrogen sulfide to produce elemental sulfur and water. Part of the sulfur produced is reacted with hydrogen to produce the necessary hydrogen sulfide. Development was discontinued due to the high cost of activated carbon relative to activated coke (Radian, 1977 Behrens et al., 1984 Spears, 1992). 

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