Will reformed C9+ aromatics polymerize and coking at high temperatures?
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Will the reprocessed C9+ aromatics, in the separation tower, experience polymerization and coking at temperatures above 350°C at the bottom of the tower? If it does cause it, what is the principle behind it?
It depends on what’s inside; if there are double bonds, coking will definitely occur. Originally, polycyclic aromatic hydrocarbons polymerize on their own at high temperatures
At 350 degrees Celsius under normal pressure, most oils undergo thermal cracking, and polycyclic aromatic hydrocarbons are even more likely to polymerize.
Are there any relevant literature or materials to provide theoretical support?
C9+ aromatics undergo polymerization reactions at temperatures above 150°C, producing some oligomers; these oligomers are rather loose in structure and, when dried, resemble soil-like material； Dehydration and condensation reactions occur at 350°C; this is what is known as char, which has strong adhesion properties and affects heat transfer efficiency.
Is there any relevant theoretical basis?
This post was last edited by longziyun on 2018-11-22 at 16:49. It’s just personal experience and opinion, but that’s indeed how it is. Chemical production is not based on mathematical exhaustive methods; in many cases, conclusions are drawn by observing phenomena, rather than relying on pure theory, and it cannot be considered to have a theoretical basis. Just take it at face value. :Lol, actually, similar statements should be included in books on catalytic cracking.