Transformation catalyst sulfidation
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During the sulfidation of the transformed cobalt-molybdenum catalyst, the sulfidation temperature reaches up to 350°C – will this affect its performance? During sulfidation, the hydrogen sulfide concentration at the outlet of the converter is higher than that at the inlet – what is the reason for this?
1. The catalyst requires high-temperature forced vulcanization; 350°C certainly will not affect the catalyst. 2. During sulfidation, the hydrogen sulfide concentration at the outlet of the converter is higher than that at the inlet. What type of sulfiding agent is being used? If carbon disulfide or dimethyldisulfide is used as a vulcanizing agent, the hydrogen sulfide output will definitely be higher than the input.
The cyclic sulfidation method using carbon disulfide and hydrogen is employed; carbon disulfide and hydrogen react before entering the conversion furnace, and hydrogen sulfide is consumed – so how can its level be high?
This post was last edited by “I’m so stupid, wuu” on May 30, 2017, at 09:17. Before coming into contact with the catalyst, only partial hydrogenation of carbon disulfide occurs within the pipeline.
The temperature is too high, causing desulfurization. Now pre-vulcanized catalysts are used; no vulcanization is required when installing them in the equipment – after purging with nitrogen and raising the temperature, the gas can be introduced directly.
Impact; it’s better to mention above 380 degrees
It has little impact on later use; it’s best to mention the vulcanization pressure. There are three reasons why the hydrogen sulfide level at the outlet is higher than that at the inlet during vulcanization: first, there are issues with the analysis; second, accumulated carbon disulfide reacts with hydrogen to produce hydrogen sulfide, which then reaches the outlet; third, organic sulfur undergoes hydrolysis