How to control the heavy metal content in catalytic cracking feed.
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How is this generally addressed in oil refining processes when heavy metals, especially Ni and V which have a significant impact on catalysts, are present at high levels?
For catalyst replacement, if it is too high, an equilibrator can be used for replacement
In the catalytic feedstock, the Ni+V content is less than 25 ppm; the feedstock is of poor quality with high levels of heavy metals, and a hydroprocessing combined process is employed in the refining process.
1. Raw material pretreatment, hydrogenation for heavy metal removal. 2. Treatment during the processing stage, methods such as metal passivation agents, dry gas pre-raising, catalyst replacement, and replacement with anti-V catalysts, etc.