Regarding bed temperature control
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A very important way to control the bed temperature is by controlling the circulation rate; a lower circulation rate results in a smaller increase in temperature, and this is related to the removal of heat. However, a low circulation rate results in reduced heat of reaction; from this perspective, the temperature will drop as well. How to handle the relationship between the two? Are there any specific theoretical foundations or data to prove this? I appreciate your advice.
When the circulation rate decreases, the reaction heat increases； A decrease in the circulating gas volume prolongs the contact time between the gas and the catalyst, bringing the ammonia synthesis reaction closer to equilibrium. As a result, the heat released during the reaction increases, causing a sudden rise in the temperature of the catalyst bed.