PSA adsorbent
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What is the typical service life of the adsorbent in PSA hydrogen concentration units? Under what circumstances does it indicate that the adsorbent needs to be replaced?
I want to know too; some manufacturers claim that their products can last for 10 years. Is that possible? Is this some kind of trick?
It is usually around 10 years; modernly designed adsorption towers no longer have discharge manholes； The adsorbent is no longer effective, and the equipment should be replaced as well. The adsorbent’s adsorption capacity declines, resulting in a severe reduction in yield; it can no longer meet the production requirements, and no adjustments are possible – thus it has to be replaced.
We’ve been using it for almost six years, and we’ve heard of no problems with the adsorbent; only the programmable valve has failed at times
Yes, due to the frequent operation of the programmable valve, although it is designed in accordance with aviation standards, the seals keep leaking air and hydraulic fluid. It’s difficult to tighten them properly, and a single triple-eccentric gasket can cost several thousand dollars – so the investment is quite substantial!
Under normal conditions, it can be used for 8 to 10 years without any problems. Additionally, it is recommended to add an appropriate amount of adsorbent during major repairs.
If the adsorbent is not packed tightly during installation, it is prone to becoming powdered, which reduces its service life.
By a 10-year service life, he means that the valve can function properly for 10 years, but once it starts leaking, it can no longer be used and requires resealing; generally, a seal lasts only 1-2 years
The service life of the adsorbent is related to the impurity content in the feed gas; if the quality of the feed gas is good, the adsorbent’s service life can exceed 10 years, whereas if the quality of the feed gas is poor, its service life is roughly around 9 years at most.
According to the design of Huaxi Institute, it is supposed to last 15 years and be retired at the same time as the adsorption tower; however, in practice, it’s not possible to operate it using the specified raw materials. About 10 years should be enough. I don’t know if there is a highest record in China.
Hello! I was wondering what the temperature difference before and after the PSA tower is like in summer where you are? What is the maximum temperature tolerance of PSA adsorbents? At the moment, here we have a temperature difference of 7 degrees between day and night, while the pressure difference remains more or less the same at night. Moreover, the tower’s operating time varies significantly with temperature.