Why does the reactor overheat during a CO conversion reaction shutdown, while the synthesis tower does not overheat and instead its temperature drops during a synthesis shutdown?
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I urge experts to explain the temperature issues related to the synthesis tower and shift switching
The ammonia synthesis reaction is greatly constrained by reaction equilibrium, and it releases relatively little heat; the temperature rise in a single stage is only a little over 100 degrees, with a conversion rate of around 20%. The transformation reaction can proceed quite thoroughly, with a conversion rate of over 90%. If steam and flow rate control are not applied, the temperature rise in a single stage can exceed 200 degrees; moreover, excessive temperatures can lead to methanation side reactions that cause severe overheating, whereas this does not occur in the ammonia synthesis reaction