Operation of catalytic absorption towers
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Dear experts, the absorbents used in the absorption towers of catalytic units are crude gasoline and stabilized gasoline, with the gasoline components ranging from C5 to C12. I would like to ask whether anyone has conducted research to determine which specific components within these gasoline fractions play a key role in absorption; not all components are involved in this process. Some components are highly active and effective at absorption, while others are inert and hardly participate in absorption at all. I appreciate any guidance you can provide
Which component plays a role depends on the composition of the oil and gas entering the absorption tower. Starting from C5, the concentration of these components decreases as we move forward; therefore, the absorption effect becomes weaker as the components in the gasoline become heavier. It’s a matter of like dissolving in like – which is why diesel is used instead of gasoline in the absorption tower.
The so-called absorption refers to the completion of mass and heat transfer in the distillation column
The absorption efficiency is primarily influenced by factors such as the temperature of the absorption liquid, as well as the top temperature and top pressure