What is the replacement cycle for the catalyst in a dry gas hydrogen production unit?
Thread Content
Could you share the replacement cycle for each type of catalyst? How often is it appropriate to replace them? Are there any new technologies that can extend the lifespan of medium-temperature catalysts? What are the main factors affecting the lifespan of medium-temperature catalysts?
Moderate pressure difference, catalyst conversion rate, operating temperature
As long as the temperature of the medium-shift catalyst does not experience sudden rises or drops, and hydrogen reduction does not occur, it generally has a lifespan comparable to that of the reactor itself. The normal operating temperature ranges from 350 to 400 degrees Celsius, with this value being adjusted according to the carbon monoxide content in the medium-shift gas. The designed operating temperature for the catalyst can reach 440 degrees Celsius, but the temperature in the reactor usually does not go that high
Let’s see how active the catalyst is; manufacturers generally recommend a lifespan of three years
We have been in operation for 10 years, and all indicators are normal
It works well; no problems for 8-12 years
The main issue regarding the replacement of medium-temperature shift catalysts at present is the environmental impact associated with chromium. Whether to replace the catalyst depends on factors such as the CO content at the outlet of the medium-temperature shift reactor and whether the bed temperature drops. I hope you can consider whether to replace the medium-temperature catalyst by taking all aspects of the device into account. Some devices can operate for over 6 years without any problems.
It basically has the same lifespan as the device – is this claim valid? The catalyst manufacturers are about to close down. The lifespan of medium-temperature catalysts also depends on many factors; it’s not possible for them to have the same lifespan as those used in the same installation.