Methanol catalyst removal

It depends on the structure of the reactor tower; there’s no problem with Casalita, and in theory, there’s also no problem with shell-and-tube towers. After meeting the carbon reduction requirements, the temperature is reduced to below 60°C.

I would like to ask you another question: how often is the temperature of the catalyst bed in your production processes adjusted, and what is the basis for such adjustments?

It depends on the conversion rate and unit consumption, as well as the requirements regarding output.

Should the conversion rate be calculated based on hydrogen or carbon monoxide? Is there a specific formula for this? ?

60 degrees? Can people go in at 60 degrees? To load and unload the catalyst, it is necessary to enter the system, and generally the temperature is required to be reduced to 40°C. With proper nitrogen protection to prevent air from entering, there will be no problems with the synthesis tower. However, if it is not passivated, it will catch fire upon exposure to air in the synthesis tower; therefore, safety measures must be taken to ensure a safe environment for unloading. After unloading, try to avoid exposure to air or minimize such exposure; transfer it directly into a catalyst tank (a covered iron tank with a capacity of 200L). Add dry ice inside the tank and seal it properly, and that should be sufficient. Passivation is troublesome, dangerous, and slow. No passivation is required; work must be carried out in a nitrogen environment. It is recommended to engage professional teams for this task, as the material will catch fire upon exposure to air, especially in powder form, which will ignite immediately upon contact with air. Appropriate preventive measures must be taken. It doesn’t get dull quickly! Soon. It is at least 3 days faster than passivation, but a sufficient and reliable nitrogen source is necessary.

Before the catalyst is unloaded, it must be passivated; if left unpassivated and exposed to air, it will catch fire due to oxidation, usually at around 60 degrees.

There are now many units that unload materials without passivation; the key factor is saving time. However, when passivation is not used, various factors need to be taken into account, such as positive pressure nitrogen protection for the system, facilities for unloading and loading at the bottom of the tower, forced water cooling during unloading, and ensuring that the shell side of the tower is filled with water to prevent localized oxidation due to bridging. In fact, a slightly passivated approach can be used to ensure that as long as there is more than half passivation, removal is also safe