How is the “dehydrogenation” operation carried out in a hydrogenation reactor

It is generally sealed or treated with a small amount of water. Reduce the catalyst again next time you drive

Pressure reduction and temperature increase in a 24-hour cyclic dehydrogenation cycle; recommended parameters: 8.0 MPa to 380 degrees Celsius

Pressure reduction and temperature increase, nitrogen circulation: The main reason for pressure reduction is that the hydrogen circulation machine cannot drive the circulation of nitrogen at the operating pressure when it is operating in a nitrogen environment; otherwise, the outlet temperature of the hydrogen circulation machine would rise due to the high molecular weight of nitrogen. First, reduce the pressure to 3.0 MPa and purge the system with nitrogen. Once the hydrogen content is below 1%, a three-stage cycling process begins: cycling at 275 degrees, 250 degrees, and 225 degrees for 8–24 hours each. During this period, the hydrogen content in the circulating gas is analyzed every 2 hours; if it exceeds 10%, the gas is discharged. If there is an upward trend in the hydrogen content, the constant temperature period can be appropriately extended.

Due to the high permeability of hydrogen molecules, reactor dehydrogenation must be carried out during shutdown to prevent hydrogen embrittlement and hydrogen blistering caused by hydrogen molecules penetrating into chromium-molybdenum steel during production. 1. Reduce the reaction temperature of CAT at a rate of 20 degrees per hour to 275 degrees, and maintain this temperature for 12 hours. Lower the reaction pressure to 4.0 MP; during this pressure reduction process, keep the speed of the circulation pump at 8000 rpm. Nitrogen is supplied via a new hydrogen generator to maintain the pressure, and if the pressure cannot be maintained, reduce the speed of the circulation pump accordingly ； 2. Analyze the oxygen content in nitrogen