What is the impact of reducing the salt content from 8 to 4 after vacuum distillation on the catalysts in the catalytic unit?
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What impact does reducing the salt content from 8 to 4 after vacuum distillation have on the catalysts in the catalytic unit? Are there any formulas or data available to show the extent of the benefits that can be achieved? Could that expert explain it?
1. Even when reduced to 4, it still does not meet the standard; the normal value is 3. 2. It certainly has benefits for the catalyst, but the extent of these benefits depends on the specific calibration data. 3. It is also necessary to consider what the composition of the salts is, as different salts have varying effects on the catalyst. The benefits generated are also different. In any case, it is necessary to reduce the salt content; otherwise, it will not only affect the catalyst but also the distillation column, leading to salt deposition.
In my understanding, a high salt content means there are more remaining metal ions. And metal ions tend to deposit in heavy oil. Take the refinery I’m currently in as an example: before the catalyst stage, there is a residue hydrogenation unit used for demetallization. If the salt content is high, that residue hydrogenation unit will be the first to be affected, and the catalyst will deactivate more rapidly.