Reasons why the olefin content in the reformed regenerated oil exceeds 1% and that in the stripped oil can exceed 2%
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What is the reason? Why has it increased?
Reforming itself is a dehydrogenation process; under the action of a reforming catalyst, although ring-forming dehydrogenation is the main reaction, due to high reaction temperatures or insufficient catalyst selectivity, some alkanes are converted into olefins rather than aromatics. When the olefin content in the crude oil is about 1%, aromatic compounds are separated from the crude oil through aromatic extraction; as a result, the raffinate becomes more concentrated, while the olefins remain in the raffinate, thereby significantly increasing its olefin content. Find a book on reformation technology to read (Aromatic Hydrocarbon Engineering, compiled by Mr. Zhao Rendian), which covers topics such as the mechanisms, processes, and catalysts involved.
That original post is no longer there, which is why it became like this.
The content of olefins has a significant impact on aromatic extraction; generally, when there is a high amount of olefins, a mild hydrogenation saturation step is carried out before aromatic extraction. Once the olefins are saturated, extraction and distillation can proceed