The effect of catalytic slurry on residue hydrogenation
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I am now planning to add catalytic slurry to the feed for residue hydrogenation. What impacts will this have on the residue hydrogenation unit, such as hydrogen consumption and reaction temperature rise? What aspects should be taken into consideration?
This seems not to work! There are too many catalyst particles in the catalytic slurry, and installing filtration equipment may not necessarily lead to a significant improvement. This can cause the catalyst bed to become clogged with solvents. It is understood that experts had previously given suggestions in this regard to Dalian Petrochemical, but for various reasons, Dalian Petrochemical has not implemented this measure.
Agree with the person above. The slurry contains a small amount of catalyst particles, which have a fatal impact on fixed-bed reactors, not to mention other issues such as hydrogen consumption ； Of course, that’s a different story if it’s a fluidized bed reactor.
It seems I didn’t explain clearly enough: before entering the residue hydrogenation reactor, the catalytic slurry needs to be sent together with vacuum residue to a solvent deasphalting unit, where the catalyst dust in the slurry is removed, and only then is it fed into the residue hydrogenation process. What impact will this have on residue hydrogenation?
This estimate has little impact, as the metal content and residue in the catalytic slurry are not too high. Moreover, when it is incorporated into the deslagging agent, the proportion of the deslagging agent should be high; therefore, the main factor affecting the feed for residue hydrogenation remains the deslagging agent. Therefore, factors such as the slag-reducing metals, residual carbon, and sulfur content need to be given special consideration.
Nearly 60% of the chemical composition of the slurry consists of polycyclic aromatic hydrocarbons, and it contains large amounts of heavy metals. Hydrogen consumption is high in the residue hydrogenation unit, and this can lead to catalyst poisoning.