Advanced functional nanoporous coatings/membranes : preparation by surface or interfacial reactions, characterization, and applications
Loading...
Authors
Dong, Qiaobei
Issue Date
2020-08
Type
Electronic thesis
Thesis
Thesis
Language
ENG
Keywords
Chemical engineering
Alternative Title
Abstract
We further investigated the new concept developed in our group, “pore misalignment”, for modifying the pore mouth size of 5A zeolite and explored the potential for the propane/propylene separation. The porous coating on 5A zeolite was generated and further modified by combining molecular layer deposition (MLD) and atomic layer deposition (ALD). As a result, the pore mouth size of 5A zeolite was adjusted to be between propane and propylene. A propylene/propane ideal adsorption selectivity of 22 and propylene/propane diffusivity ratio of 75 were obtained on MLD/ALD modified 5A zeolite. In the meanwhile, the propylene adsorbed amount kept at a relatively high value. These results demonstrated that the combination of MLD and ALD is a promising way of precisely adjusting pore mouth size of adsorbents for separation of gas molecules with very small size differences.
Description
August 2020
School of Engineering
School of Engineering
Full Citation
Publisher
Rensselaer Polytechnic Institute, Troy, NY