Must a conversion catalyst be a pre-sulfided catalyst?
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Must a pre-sulfided catalyst be used for sulfur-tolerant shift catalysts?
It’s not necessarily the case; online vulcanization before use is also a good option.
Online vulcanization is still more common generally.
It’s not necessarily the case; some use online vulcanization while others use pre-vulcanization
We use both types, and the activity of the presulfided catalyst seems to be lower than that of the in-line sulfided catalyst.
It depends on the composition of the gas you use for conversion – whether it is obtained from natural gas conversion or from coal gasification