Fixed-bed hydrogenation
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Dear experts in this field, fixed-bed hydrogenation reactors generally operate with material flowing in from the top and out from the bottom. I would like to ask whether it is possible to modify them to use a feeding pattern where material flows in from the bottom and out from the top. If so, what are the considerations involved, and what changes need to be made?
Sure, you can look into Chevron’s residue hydrogenation process; the first reactor uses an upflow hydrogenation configuration
If possible, would it be necessary to make some adjustments to the catalyst loading and the internal structure of the reactor? It must be difficult to modify high-pressure hydrogenation reactors, right? ? Could you provide some relevant technical documents for reference?
I know that suspended-bed reactors have feed at the bottom and discharge at the top; is this residue oil hydrogenation process carried out in a suspended-bed reactor?
Fixed-bed residue hydrogenation; the bubbling bed is also upward-flowing
For residue hydrogenation, the first protection reactor is of fixed-bed type, with material flowing in from below and out from above; there is also diesel liquid-phase hydrogenation, and its reactor also features material flow from below to above. Bottom air intake relates to how hydrogen is distributed in the oil, as well as components such as distribution plates.