|MadSci Network: Chemistry|
In reading about carbon black, there seems to be several processes for producing carbon. Many of these processes use differing feedstocks to produce the desired quality of carbon black. The quality seems also dependent on the "art" of its production. The CB from acetylene, furfural extracts, or heavy residuum differ in their properties. From my experience, sulfur in the "free" state, is extremely small. Sulfur in hydrocarbon feeds consist mainly of organically bound sulfur, mercaptans, sulfides, and thiophenes. The sweetening of hydrocarbon streams deals with these organic sulfur compounds using caustics and amines. During processing, the inorganic sulfur compounds generated are mainly hydrogen sulfide, carbonyl sulfide, and sulfoxides. Sulfur recovery plants produce elemental sulfur from these gas streams. From your question, it's difficult to determine the source of the carbon black, the nature of the process CB is being used, and the quantities of CB you're processing. These will play a major role in determining a system suitable for your needs.
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