High levels of gum in petroleum products can be removed through adsorption; is this method feasible?
Thread Content
We want to use an adsorption method that allows for continuous regeneration, but the problem is that using clay for adsorption generates a large amount of waste clay that needs further treatment； If molecular sieve catalysts are used for adsorption, is regeneration easy to achieve? Scorch regeneration or solvent elution regeneration? Which method is simpler in terms of processing, with easier-to-achieve process conditions?
For molecular sieve adsorption, regeneration cannot be carried out by burning. The reason is that high temperatures will burn and destroy the structure of the mesoporous molecular sieve. Solvent elution for regeneration is also not easy to achieve, as the amount of solvent used would be extremely large. And how do you remove the solvent from the molecular sieve? The regeneration method that can be used is steam regeneration. Steam is passed through the molecular sieve at a temperature of 150–180 degrees; after a certain period of time, the gums are completely washed away from the molecular sieve. Then, dry hot nitrogen gas (at 160–180 degrees) is introduced to dry and regenerate the molecular sieve. With a process like yours, you need at least 3 molecular sieve towers: one for adsorption, one for steam washing, and one for nitrogen regeneration. Reuse.
The simplest and most cost-effective method is still acid-base cleaning
If this method were feasible, refineries would have been upgraded long ago; then why would there be so many refining towers?