Questions about catalysts
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May I ask what the components of these catalysts are? Why can’t catalysts come into contact with water? Why is steam preheating necessary before starting up?
Different products use different catalysts; your question is too general. Please refer to the catalyst summary post in the production area: Compilation of Production Technology Exchange Materials--Catalyst Poisoning, Deactivation, and Regeneration (Summary)
Your question is too broad; it needs to be more specific. It would be best to specify what type of catalyst it is. I know that catalysts can be either in solid particle form or in liquid form.
I’m talking about non-hydrotrope condensation catalysts
Catalysts lose their activity when exposed to water; generally, catalysts cannot be exposed to either water or oxygen
Who says that a catalyst must become inactive when it comes into contact with water? Catalyst components are generally divided into carriers, active components, and additives. As for what the original poster mentioned about using steam for preheating before starting up, it is because some catalysts require a certain activation process; in other words, they need a specific amount of activation energy in order to function as catalysts. However, the temperature cannot be too high, otherwise it may cause the active components of the catalyst to sinter or fall off, resulting in deactivation.
What are the main components of non-hydrogenated dewaxing catalysts? Do they react with oil and gas molecules?