On the issue of high height-to-diameter ratio of catalyst loading in white oil hydrogenation units
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The precious metal catalysts used in the white oil hydrogenation unit have a high height-to-diameter ratio, of around 10 for each reactor; the two reactors are connected in series. With a constant space velocity and fixed residence time, what is the purpose of using such a high height-to-diameter ratio?
Personally, I think it might be that the catalyst was packed with a high aspect ratio, which reduced the impact of channeling in the feed oil, but at the same time introduced edge-wall problems. Is there a minimum diameter requirement for reactor design?
In my opinion, this design should be based on the processing load calculation!