Dear Prasad,

There are four different molecular sieves that differ in their sizes and each type is capable of adsorbing different liquides or/and gases. The four types are: 3A, 4A, 5A and 13X

Type 4A sieves are able to adsorb cyclohexane.

For more details, please use the following link:

https://books.google.ps/books?id=XWYqh1an5sQC&pg=PA32&lpg=PA32&dq=Can+%27Molecular+Sieves%27+be+used+to+adsorb+Cyclohexane&source=bl&ots=ZXSdApFGDr&sig=OGKX2BvMxObxI1F4yDi94eTdIGY&hl=en&sa=X&ved=0ahUKEwji9Lv47rbKAhVJ6xoKHUnTCrIQ6AEIGzAA#v=onepage&q=Can%20'Molecular%20Sieves'%20be%20used%20to%20adsorb%20Cyclohexane&f=false

Hoping this will be helpful,

Rafik

according to the pore size and SiO2/Al2O3 ratio, you can select a proper molecular sieve for the project. High SiO2 /Al2O3 ratio zeolite, shcu as zsm-5 (pore size 5.4*5.6A), M, and Beta are hydrophobic material can do a better job for removing cyclohexane from air. zeolite 3A, 4A, 5A and 13X are low SiO2/Al2O3 and they are hydrophilic material, which can remove H2O from the air efficiently.

Hoe above information is useful for your project.

Best regards,

Kui 

Yes, it also function like adsorbing agent as Activated Carbon does, but with shape selectivity. Only the molecules less  than the pore size can be adsorbed. a proper molecular sieve can be a adsorbing agent with shape selective property, sieve molecules.

I'm quite confused, if fresh air can actually pass through Molecular sieve leaving cyclohexane behind; as molecular sieves have a large affinity to adsorb nitrogen off the air. The purpose is to avoid cyclohexane into the chamber but the air should pass further through the activated carbon layers and then into the chamber.(SEE ATTACHMENT)

molecular sieves, 3A, 4A, 13X, are used for N2/O2 separation in industry. but other zeolite such as ZSM-5, Linder Y, Beta, M are not. They are high SiO2/al2O3  ratio zeolite, and they will adsorb cyclohexane and other organic chemicals  selectively from air.

If by any chance, if you are in contact with any firm that works with ZSM-5, Linder Y, Beta, M kind of zeolites, it would be of great help. I would contact them and get some samples for test and would be a strong point defining my thesis topic. Thank you!