What should be done with the regenerated hydrogenation catalyst after it has been soaked in water?
Thread Content
As the title suggests: The regenerated hydrogenation catalyst, after being installed in the reactor, was exposed to water during use (I don’t want to go into detail about the reasons; it’s frustrating enough not to even mention them:Q). It shouldn’t be too serious, but mainly the catalyst located in the lower part of the reactor came into contact with water. What should be done in this situation? 1. Dry slowly, reduce the heating rate? ? 2. What impact will this have on normal production in the future?
It is mainly to prevent too rapid an increase in temperature, which would cause the water inside the catalyst’s micropores to vaporize quickly and lead to the fragmentation of the catalyst particles, resulting in their breakdown into powder.
It is recommended to communicate with the manufacturer of the catalyst; this situation is generally not encountered. Wishing you success in resolving it
After being soaked in water, even if it is dried slowly, its strength will **decrease** and its service life will be reduced; it’s best to replace it as soon as possible after using it once. Avoid fluctuations during use, and closely monitor the pressure difference before and after.
There should be no major issues with the catalyst’s activity; the key issue is its strength. By reducing the heating rate, it is possible to increase the drying time slightly. It will be necessary to consult the catalyst supplier for more details.
The strength will definitely have an impact; for specific details, it’s necessary to contact the manufacturer and wait for a solution, which will then be shared
There are ceramic balls at the bottom of the catalyst, which can prevent some of the water vapor from escaping; it is recommended to carry out air drying at 50–60°C with a high circulation rate. It is estimated that at least two days are required for this process, after which the temperature can be increased to facilitate further dehydration. Check the manufacturer’s recommendations carefully; never increase the temperature blindly. The catalyst may already be damaged; after being exposed to water, its strength decreases, and under the weight of the catalyst above it, some of it gets crushed, which leads to an increase in pressure difference once operation resumes. This requires attention in subsequent stages.
First, use nitrogen with a high flow rate for cold stripping in order to remove as much water as possible. Then increase the temperature slowly – it must be done gradually. It’s best to consult the catalyst manufacturer regarding this; this is definitely a serious issue
In my opinion, it is still necessary for catalyst manufacturers to replace those parts of the catalysts that have been severely exposed to water; once catalysts get wet, their strength decreases, making them extremely prone to breaking and becoming powdered
Why is water entering? Included with the raw material tank? Has the alkali wash water from the shutdown not been discharged? It was also an accident; learn* avoidance measures