The catalytic dry gas has a high isobutane content
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The C3 content in our catalytic dry gas is approximately 1.6% (v), of which isobutane constitutes the highest proportion at around 0.5% (v), accounting for about 30%; the other C3 components are distributed relatively evenly. I would like to ask the experts: what methods can be used to reduce the isobutane content, so that the C3 content in the dry gas will be much lower?
The reabsorption effect is poor; try increasing the reabsorption dose appropriately and make adjustments while observing.
Is a top-loop mechanism being used for the reabsorbent?
Is there any room for adjustment regarding the pressure in the reabsorption tower, as well as the temperature and quantity of the reabsorbent?
Previously, I read an article saying that using top circulation as a reabsorbent works very well, and it also improves the separation accuracy of the distillation column significantly. Is that the case, please? Personally, I estimate that the separation accuracy of the fractionation tower could be improved somewhat.