Why does the hydrogenation catalyst HDO-18 need to be reduced?
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Why does the hydrogenation catalyst HDO-18 need to be reduced when it is shut down? Generally, hydrogenation catalysts lose their activity after reduction; then why does our HDO-18 catalyst (used primarily for olefin removal) need to be reduced with hydrogen in order to restore its activity?
Is there any expert who knows this and can give some guidance?
I’ve never heard that catalysts are reduced to increase their activity. Do they still have activity after being reduced? Waiting for experts to provide answers
What is the main metal in the catalyst? Please provide information on that type of catalyst first
This catalyst is used for deoxygenation of olefins; it has good reductive activity. Mainly nickel-based
Why does this catalyst (HDO-18) need to be pre-sulfurized? Is its main active substance in the metallic state or the oxidized state? I would also appreciate some guidance from experts
HDO-18 is a Pt catalyst on Al2O3. Oxidized state -> Reduced state -> After sulfidation, it becomes a metal sulfide.
This catalyst does not require pre-sulfurization; it is a precious metal and is sensitive to sulfur
Do you mean that the reactivity of the oxidized state is higher than that of the reduced state, which in turn is higher than that of the sulfided state?