Comparison of specific surface area, pore volume, and average pore size of molecular sieves
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I would like to ask everyone: There are two types of ZSM-5 molecular sieve powders, both with a silica-to-alumina ratio of 60. The difference between them is that one type has an average particle size of 5 μm, while the other has an average particle size of 10 μm; all other properties such as crystallinity and Na2O impurity content are the same. So, what are the patterns regarding the specific surface area, pore volume, and average pore size of these two types of molecular sieve powders? Does a material with a larger average particle size generally have a smaller surface area, pore volume, average pore size, and so on? If anyone who knows this is around, please give some advice. Thank you!
It might be due to the experimental materials or equipment. I’ve used TCI’s products before; I recommend giving them a try.
The surface of molecular sieves is mainly the internal surface. The particle size at the micron level is generally the size of aggregates, not the size of individual crystals. There is no inherent relationship between particle size and specific surface area.
What we have prepared are small-grained ZSM-5 molecular sieves, with an average particle size of 0.5 micrometers, that is, 500 nanometers; molecular sieves of such a small size should have very high activity.
To determine the activity, one still needs to look at the reaction.
What kind of reaction are you studying?
I have used ZSM-5 for alcohol synthesis from water, as well as for converting methanol into gasoline using ZSM-5.
What is the reaction of hydroxylative alcohol synthesis? What is the product?
Cyclohexene-cyclohexanol Isobutylene-tert-butanol