Presulfurization of sulfur hydrogenation reactor
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Why does molybdenum trioxide need to be in the presence of hydrogen to react with hydrogen sulfide during presulfurization?
Interesting question, thanks for sharing
Hydrogen mainly plays a reducing role. In the absence of hydrogen, hydrogen sulfide reacts with metals to form high-valent sulfides, which have poor activity. Hydrogen reduction produces low-valent sulfides with good activity.
Pre-sulfidization refers to the process in which molybdenum trioxide turns into molybdenum disulfide. . Molybdenum trioxide cannot be completely reduced by adding two molecules of hydrogen sulfide; an additional molecule of hydrogen is needed in order to fully convert it into molybdenum disulfide and water. I’m not sure if it’s correct, but our pre-vulcanization formula is as follows.