How to control the carbon content of the catalyst precursor in catalytic devices
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Are there any specifications for the carbon content of the unreacted catalyst in catalytic units? How to control it? Is it adjusted through stripping steam?
I don’t recall there being any specific criteria for the carbon content in the green body; the carbon in it comes either from the carbon substances present in the raw materials (which cannot be controlled) or from the polymerization of oil and gas (which can be controlled).
Our value is below 0.1; the intensity of coking is controlled mainly through the circulation rate and residence time, while the stripping steam is used to reduce the amount of oil and gas carried by the catalyst
It’s probably the processing volume and the residual carbon in the raw materials that have a significant impact, along with factors such as the stripping efficiency, catalyst circulation rate, residence time, and reaction depth.
It cannot be adjusted directly; the residence time is calculated by dividing the total storage capacity of the regenerator by the circulation volume. Since the storage capacity generally does not change much, only the circulation volume can be adjusted
Less than 0.1 – does that refer to the carbon content of the regenerant?
Yeah, how is carbon content controlled in the spent catalyst? Only the regenerated catalyst can be controlled; that’s probably what the original poster meant. If it’s really a spent catalyst, there are four types of carbon in it: catalytic carbon, steam-extractable carbon, additional carbon, and contaminated carbon. The carbon content in spent catalysts is difficult to control, and there’s no need to control it either