The problem of catalytic reduction
Thread Content
Why is it necessary to operate at a low load for 72 hours after the catalyst reduction in the ammonia synthesis tower is completed? Can’t we start production with a load applied directly? How long will your companies be operating at low load? This post was last edited by snowdfr on 2009-2-6 11:09.]
Light-load production is employed for two reasons: first, to allow the synthetic catalyst to be fully reduced and to help it adapt to production; second, to gradually bring all parameters back to normal levels, thereby enabling greater operational flexibility at low loads and low intensities. It’s like when you buy a new car; you need to let it run at low engine speed for some time, as the saying goes, to \"break in\" the car. Light-load production essentially means the same thing.
Primarily, the structural properties (strength) and thermal stability of the catalyst right after reduction are not very good; therefore, it is necessary to allow these properties of the catalyst to gradually stabilize under low load conditions before full-scale production can begin. The general requirement is 72 hours; for normal light-load production, 24 hours or more is sufficient.
The catalyst has not been fully reduced yet; there is a period of low-load operation that allows the catalyst to be fully reduced. The required time for this process is 72 hours, and it’s ideal to achieve this timeframe. However, some owners prioritize production volume, so they fail to meet the 72-hour requirement
We have been following a 72-hour light-load production policy. Enable the catalyst to transition safely to its optimal active state.