In hydrorefining, why can’t the bed temperature exceed 230 degrees when the hydrogen sulfide concentration during pre-sulfidization is below 5,000 PPM?
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In hydrorefining, why can’t the bed temperature exceed 230 degrees when the hydrogen sulfide concentration during pre-sulfidization is below 5,000 PPM? It is said to be to prevent the catalyst from being reduced. Does anyone have any specific information?
That’s right, it’s to prevent the catalyst from being reduced. Catalyst manufacturers all have such data.
The temperature must not exceed 230 degrees before the catalyst penetrates the bed. Because the catalyst that has been overly oxidized reacts with hydrogen to form metal; once the catalyst is reduced to metal, it can no longer be used. The specific vulcanization plan will be provided to you by the catalyst manufacturer.
The oxidation-state catalyst is stripped by high-temperature hydrogen in a high-temperature hydrogen environment, resulting in the reduction of the catalyst