Indicator for determining the completion of reduction of copper-based catalysts
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In methanol synthesis, the reduction of copper-based catalysts is extremely important; the reduction of these catalysts determines the yield of methanol and thus the economic efficiency of production. From the start to the end of the reduction process, it is necessary to strictly control various process parameters. The three key principles for reduction are: (1) Three lows: low temperature during water removal, low temperature for the reduction process, and a low-load operation period after reduction； (2) Three stabilities: temperature stabilization, H2 supplementation stabilization, and water output stabilization ； (3) Three prohibitions: It is prohibited to raise the temperature while introducing H2, it is prohibited to allow moisture to enter the tower, and it is prohibited to discharge water at high temperature for an extended period of time ； (4) Three controls: controlling the hydrogen supplementation rate, controlling the CO2 concentration, and controlling the hourly water output. During the reduction process, it is necessary to follow the reduction plan strictly; therefore, determining when the reduction is complete is very important. What are the indicators that indicate the completion of the reduction of copper-based catalysts? Let’s start a discussion! ! !
The hydrogen concentration in the gases entering and leaving the synthesis tower is roughly equal and remains unchanged.
Indicators indicating that the reduction of the copper-based catalyst is complete: 1. The cumulative amount of water produced is close to or reaches the theoretical amount. 2. The water output rate is zero or less than 0.2 KG/H. 3. The concentrations of (CO+H2) at the inlet and outlet of the synthesis tower are essentially equal.
Add a little; the water drained from the separator has a slight alcoholic taste