Phase of molecular sieves
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As I recall, molecular sieves are very hard, have a regular shape, and hardly shed any powder. A few days ago, some imported molecular sieves arrived; their shapes were extremely varied – particles ranging from 2.3 to 5.5 mm in size were all mixed together. Basically, none of them were regular spheres, and many of them were already partially damaged. When touched, they released a lot of powder. It is suspected to have been used, replaced from the air separation PSA? Could those with experience give some guidance?
It is suspected to have been used. (Personal opinion)
It seems that even if these aren’t used, their quality is still poor. I haven’t conducted in-depth research on this, but those that have been used are all very regular and uniform in shape
I’ve never seen anything like this! Where is it used?
It is used for gas purification. It’s too exaggerated; it seems like it’s been activated by repeated heating, and then the contents from different containers have been mixed together
It’s clear that it’s been used; it looks very similar to those taken out of the drying tower. Its shape is irregular, and powder falls off when picked up
Can this also be called a molecular sieve? ? ? You’ve been scammed, right? What’s the quality like, and what’s the model?
Firstly, your understanding of molecular sieves is certainly correct; based on what you’ve said about the quality of this batch of molecular sieves, it seems there is a quality issue
In our air separation units, the molecular sieves are spherical in shape, but they are quite hard and show no signs of dispersion; this indicates that their quality is very poor – it seems they have been used before
The quality is poor; the good ones are more or less of the same size, there’s no powder, and it’s very dry.