What are the respective ranges for heavy metals in coking wax oil, desulfurized residue, and wax oil?
Thread Content
What are the acceptable ranges for heavy metals in coker wax oil, residue reducer oil, and wax oil? Since our company is unable to test for heavy metals in raw materials, catalyst poisoning has been a serious issue lately, with relatively high levels of vanadium in the catalysts. We would like to know which type of oil is responsible for this
Generally, there are fewer heavy metals in wax oil; the heavy metals are mostly concentrated in the residue fraction, so it is sufficient to focus on examining the residue.
Additionally, the heavy metal content in heavy oil is closely related to the quality of crude oil; if there are no analysis data, checking the evaluation reports for that type of crude oil might be useful
In the case of coker wax oil, the damage caused by nitrogen oxides to the catalyst is greater than that caused by heavy metals! I remember I also replied in your post yesterday – the operation of the entire system was extremely uncomfortable; things improved a lot only after we reduced the blending ratio to 5%!
Could I communicate with your department? The properties of heavy metals are closely related to those of crude oil; generally, crude oil from South America contains a significant amount of heavy metals
The heavy metal content in residue is generally higher than that in wax oil; nickel and vanadium poisoning pose significant problems, and the only solution is to replace the catalyst, but it is necessary to control these issues at the source. .
Vanadium poisoning damages the catalyst carrier, and the nickel content in the catalyst accelerates this damage to the catalyst carrier, which is quite problematic.
The combination of sodium and vanadium is even more harmful. Residue is the worst.
What is your unit consumption of catalyst?
The heavy metals in coker wax oil are generally below 0.5PPM; it’s better to focus on residue oil instead