What are the overheating conditions for methanol catalysts?
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What are the overheating conditions for methanol catalysts? Everyone is welcome to discuss
During the heating and reduction process, hydrogen coordination is not well controlled
The hydrogen-to-carbon ratio of the feed gas is too low, the pressure in the drum is too high, the pressure in the auxiliary steam pipeline network is too high, and the supply volume of boiler feed water is insufficient~~~
Flight temperature includes the entire process of methanol catalyst production: 1) Flight temperature during pressure testing of the synthesis tower after catalyst loading； 2) Temperature spike during heating reduction process ； 3) Flight temperature during normal operation ； 4) Excessive temperature rise during catalyst deactivation.
The entire system lost power; the water supply to the boiler was cut off. The pressure control valve of the steam drum failed, resulting in overpressure. A large amount of air entered the system, and air got into the system during the reduction process
As long as the flight temperature is involved, it’s about pressure release and pressure charging!
Temperature rise during pressure testing of the synthesis tower after catalyst loading: Under normal conditions, nitrogen is used for pressure testing; using air is not a problem either, but using hydrogen or a mixture of hydrogen and nitrogen poses significant issues. Hydrogen does not react with copper oxide in the catalyst under normal temperature and pressure conditions, but it reacts when the pressure reaches a certain level. Based on experience, at room temperature: with a low-pressure methanol catalyst (containing 58% CuO), a temperature spike occurs when the pressure reaches 1.5 MPa ； At a pressure of 10 MPa in the medium-pressure methanol catalyst (with 43% CuO content), temperature runaway occurs ；