Black burning of reforming catalysts
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The reforming catalyst begins to burn black when its carbon content is between 3-5%. Why doesn’t it start burning black at levels below 3-5%, and what are the consequences of burning black at such lower levels?
Under low-carbon conditions, black burning is possible, but it isn’t necessary. The wind temperature resulting from burning will also decrease linearly. Blackening in advance doesn’t have many side effects; it’s just not necessary. Black firing involves no chlorination, which is detrimental to the surface area. Char should be accumulated as soon as possible, after which the burning mode should be changed from black to white burning, followed by chlorine injection for regeneration.
The main consideration is the burning load issue in the catalyst regeneration unit; too low a carbon content leads to unstable burning. The catalyst’s activity allows for a certain amount of carbon buildup, and there is no need to cause premature burning – circulating the carbon buildup is sufficient
When the carbon content is low, it’s difficult to control the amount of air required for burning
After device maintenance and filter replacement, it takes some time for carbon buildup to occur; generally, 7–15 days are required. There’s no need to attempt regeneration too early, as this can lead to burning
Hello, I work in the propane dehydrogenation process. Chlorine is introduced once the catalyst starts circulating, and it is also added during abnormal combustion!
The coking capacity of the regenerator, along with stable operation