The issue of catalyst pre-wetting
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I would like to ask the teachers: In the Q&A on hydrogenation refining technology, there is a statement that says, “Catalyst pre-wetting prevents the formation of dry zones in the catalyst bed, as the presence of such dry zones reduces the overall activity of the catalyst.” ” I would like to ask what is the principle or reason behind the fact that the presence of a dry zone reduces the overall activity of the catalyst? Thank you! ! !
Throughout the entire production process that follows, the distribution of materials within the bed will be affected; as a result, the utilization rate of that portion of the catalyst will remain low, or it may even be bypassed.
Pre-wetting is done to increase the activity of the catalyst; the dry areas are those that have not been pre-wetted, and naturally their activity is lower
If the catalyst is not pre-wetted properly, dry areas will form. The presence of these dry areas leads to flow deviation, with the oil flowing around them; this area does not participate in the reaction. Prolonged flow deviation can also reduce the stability of the catalyst.
What is the reason why the utilization rate remains low? Will the materials no longer flow in this direction from now on?
"Where there is no pre-wetting, the activity is naturally low. \"What is the principle behind this?\"
Yes, it’s the poor distribution of materials!