The impact of DMDS on the cracking process (without considering the subsequent system)
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The book states that DMDS can form a sulfur film, which reduces the formation of CO. If a sulfur film forms and the surface becomes coked, preventing the raw materials from coming into contact with the cadmium-nickel alloy, then some more sulfur needs to be added – is this done to prevent the metal that seeps through from catalyzing the formation of CO? Does the book also say that preventing carburization relies on a sulfur film? I hope the experts here can give me some advice
Sulfur can react with iron on the surface of the furnace tube metal to form a ferrous sulfide film layer, which prevents coke from adhering to and penetrating the surface
Carburization first requires the release of carbon; the S film can prevent nickel from catalyzing this carbon release. Therefore, as long as as little or no carbon is released, that is, as little coking occurs, carburization will be prevented.