Why use high-hydrogen reduction
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This post was last edited by Zuo You Bu Fen on 2011-6-28 at 12:27. Why is high-hydrogen reduction used when reducing ammonia synthesis catalysts? What are the advantages and disadvantages of low-hydrogen reduction? Besides reducing time, what are the deeper reasons? Solve it from the principle
High hydrogen reduction can accelerate the reduction rate, but it is necessary to increase the space velocity to prevent the water vapor concentration from exceeding the limit.
This post was last edited by TH373637 on 2011-6-28 at 10:13. There are many discussions on the forum; you can search for them yourself. Moreover, there are now also discussions on low-hydrogen reduction
The use of high-hydrogen reduction is aimed solely at shortening the reduction time, minimizing damage to the catalyst’s strength and activity during the reduction process, and extending the catalyst’s service life.
Reply 3# TH373637 Not necessarily
Reply to 4# shouzhang: Isn’t low-hydrogen reduction better for the catalyst?
Reply to 5#: Order doesn’t really matter; the key factors are the reduction time and the quality of the reduction. High hydrogen levels can shorten the time required and also suppress some of the reactions involved in ammonia synthesis
High-hydrogen reduction can inhibit the ammonia synthesis reaction and facilitate deeper reduction of the catalyst, achieving a more thorough reduction and thus better reduction results. However, too high a hydrogen level results in fewer synthesis reactions, and a greater power output from the heating furnace is required; otherwise, it will affect the progress of the entire reduction process. However, in large-scale fertilizer production, small-particle catalysts are used, and as long as there is an appropriately sufficient amount of hydrogen, the effect is satisfactory. High-hydrogen or low-hydrogen reduction – when it comes to synthetic catalysts – actually involves process issues such as the flow processes and compressors, among others.