Desulfurization of catalytic cracking gasoline.
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With gasoline hydrogenation as a follow-up process, is the desulfurization and denaturation of catalytic cracking gasoline still carried out? Thank you
Looking at the requirements for the raw materials used in gasoline hydrogenation, it is generally possible to convert thiol compounds into elemental sulfur through hydrogenation; these compounds turn into hydrogen sulfide as a result. However, there are limits on the total sulfur content in the raw materials used for gasoline hydrogenation. If the total sulfur level exceeds the acceptable range for the hydrogenation process, it can lead to gasoline with an unsatisfactory sulfur content after hydrogenation.
Currently, gasoline produced to National V or even National VI standards has a very low sulfur content, so there is no need for gasoline desulfurization units. However, if gasoline produced to National IV standards is used, it is necessary to employ such units to remove some of the sulfur
The gasoline desulfurization unit at the rear of the catalytic system is mostly used as a backup option and is rarely activated. We have removed both sets of such units here, keeping only one; it’s easy to see that its role is quite limited!