catalyst
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The first-stage reactors in the Klaus reactor use LS-971 and LS-981G catalysts, while the second-stage reactors use LS-02 type catalysts. I would like to ask the experts here: in normal production, is the catalyst in an oxidized state or a sulfided state? Thank you
It must be in a sulfided state; over time, ferrous sulfide will be formed.
When purchased, the catalyst is generally in an oxidized state and is relatively stable. During operation of the plant, presulfurization is required to maintain the catalyst’s activity; therefore, it is in a sulfided state
New catalysts are generally in an oxidized state, and sulfurizing agents need to be added at the start of operation to sulfurize them and improve their catalytic activity.
What requires pre-sulfurization are the cobalt oxide and molybdenum oxide in the Scott hydrogenation reactor; I haven’t heard that the Claus reactor needs pre-sulfurization
I don’t get it – Ls981 and 971 should be catalysts for the Klaus reaction, while Ls02 is supposed to be a hydrogenation catalyst. Haha, I’m confused
Only hydrogenation catalysts require presulfurization; Claus reactor catalysts do not