The differences between top-in-bottom-out and bottom-in-top-out feeding in the hydrogenation pre-reactor, and their advantages and disadvantages.
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After the unit was started up, there was a significant amount of liquid in the pre-reactor; it is planned to introduce hydrogen to this liquid phase by feeding it from the upper part of the reactor. Please feel free to share your thoughts and help me out with my questions
Reactions with gas entering from above and exiting from below are generally gas-phase reactions, while those with liquid entering from below and exiting from above are liquid-phase reactions, right?