Sulfur recovery
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What is the reaction mechanism by which benzene derivatives cause coking or carbon deposition on the catalyst in a Claus reactor? In this reactor, what process gas compositions and operating conditions are likely to exacerbate the aforementioned reaction? Thank you!
Sulfur recovery technologies and engineering are described on pages 12 and 184 of the book; coking is primarily caused by the incomplete combustion of hydrocarbons, which results in the formation of powdered carbon or tar-like substances. These hydrocarbons refer to both aromatic heavy hydrocarbons and light hydrocarbons. The book states that generally, the hydrocarbon content in acidic gases should be less than 4%, but from what I understand, it should not exceed 1% to ensure reliability.
The answer above is correct; it’s mainly due to the incomplete combustion of hydrocarbons