Which produces more coking, reprocessed oil or crude oil?
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Which produces more coking, reprocessed oil or crude oil? Is it due to more material being sent back for refining, causing the bed temperature to drop? I remember that the density of reprocessed oil is more or less the same as that of crude oil
Re-refining is likely to be more intensive, so the amount of raw coke produced should be greater than that of the feed oil
Re-refined oil is a product; the amount of raw coke produced is relatively high. Different situations yield varying results when using re-refined oil, as it can be used both to raise and lower temperatures~~~
This post was last edited by mxtao123 on 2010-2-25 at 21:37. The amount of coking in reprocessed oil is not significant; coking mainly comes from the feedstock. According to empirical data from \"Fluidized Technology in Catalytic Cracking,\" it is believed that for every 0.2 increase in the reprocessing ratio, the bed temperature of the regenerator decreases by 100 degrees, which corresponds to a 0.6% change in the coking rate. During normal operation, increasing the amount of reprocessing is used to reduce the reaction depth.
Re-refined oil has a high content of aromatics and generates a large amount of coke. Moreover, with a large amount of reprocessing, the bed temperature should increase.
It is related to the composition and properties of re-refined oil, such as residue. I think that with the same processing volume, coking in the re-refining process will definitely be severe
Reprocessed oil contains a large amount of polycyclic aromatic hydrocarbons, along with a high volume of raw rubber
Re-refined oil contains a high proportion of heavy fractions, and the coking substances are mostly heavy components; if the operation in the regeneration section is not proper, the amount of coking produced will be high
Agree with the views from floors 7 and 8. Additionally, page 483 of \"Catalytic Cracking Processes and Engineering\" (2nd edition) provides an introduction to reprocessed oil (heavy recycled oil).