As the feed components to the catalytic cracking reactor become lighter, how does the reaction temperature change?
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I am currently in the * stage of learning, and I have a question I would like to ask the more experienced colleagues. If the composition of the feed changes and it becomes lighter, what will happen to the reaction temperature while keeping the catalyst circulation rate constant? My understanding is that if the feed becomes lighter, it means there are more alkanes, cycloalkanes, and olefins; their reactions are primarily decomposition reactions that are endothermic, so the temperature should decrease. I’m not sure if this understanding is correct.
The direction of understanding is good; it relates to the thermodynamic principles of catalytic cracking reactions. The overall thermal reaction in catalytic cracking should be an endothermic reaction, and this tendency is even stronger when there are more light components present!
The feed becomes lighter; the boiling range decreases, the specific gravity drops, and the residue content falls. Under the same conditions, the light load will increase slightly, but the operation will be disrupted; it is best to follow the design specifications.
Thank you for the reply; I am currently in the training phase. There will be many more issues that will require everyone’s help in the future. Thank the Haichuan Forum for providing a platform for learning*.