The hydrogen sulfide content in the circulating hydrogen is high
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Does a high hydrogen sulfide content in the recycled hydrogen affect the desiliconization effect? Why does the hydrogen sulfide level continue to rise after starting up, even though the sulfur content has been reduced to below 1000 after the catalyst sulfidation is complete?
It should have little impact on desilication； Co,Mo catalysts need to be in a sulfided state to remain active; therefore, the circulating hydrogen must contain 0.05%-0.3% sulfur. During the feeding of naphtha, the organic sulfur in the oil is converted into inorganic sulfur, which results in a high hydrogen sulfide content – that’s my personal opinion.
In my opinion, it is due to an incomplete sulfur removal process after the catalyst sulfidation is completed.
The sulfur content in the raw materials is converted into inorganic sulfur and carried into the recycled hydrogen
What does it mean that the hydrogen sulfide level keeps rising after production starts? Is it because hydrodesulfurization is carried out after the raw materials are added, and the sulfur content in those raw materials is high?
The purpose of pre-sulfurization is to convert the catalyst into a sulfided state; after operation begins, due to the high sulfur content in the feedstock, the organic sulfur is converted into hydrogen sulfide in the hydrogenation reactor
Analyzing the sulfur content of the raw material suggests that it is likely to have a high sulfur content. Hydrogen sulfide has accumulated.
It has an impact; it’s chemical equilibrium after all. The continuous rise is likely due to high sulfur content in the crude oil