Marker for synthetic catalyst reduction
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What is the sign that catalytic reduction is complete?
Single-tube baffle-type internal component; criteria for determining the reduction endpoint of Type A202 catalyst: A. The sensitivity temperature remains between 480–495°C for more than 6 hours. B. The catalyst temperature at the bottom point must be maintained above 475°C for 8 hours, with the water vapor concentration remaining below 0.2 g/m3 for 3–4 consecutive hours. C. The time for all points other than the sensitivity point and the bottom point to reach 495°C is over 8 hours.
1. The water output reaches over 80% of the theoretical value； 2. The water vapor concentration remains below 0.2 mg/L for 2 consecutive hours ； 3. Once all electric furnaces are removed, the furnace temperature can be maintained relying on the heat of reaction ； 4. The pressure in light-load production systems is below 20 MPa (ammonia synthesis systems at 31.4 MPa).
We primarily use water vapor concentration as the criterion; it needs to remain below 0.2 mg/L for 4 consecutive hours.