Flux of isobutane vapors near saturation through multi-layered ceramic membranes

0573291 - ÚCHP 2024 eng A3 - Přednáška/prezentace nepublikovaná
Loimer, T. - Setničková, Kateřina - Petričkovič, Roman - Uchytil, Petr
Flux of isobutane vapors near saturation through multi-layered ceramic membranes.
[International Conference on Inorganic Membranes (ICIM 16), hybrid conference /16./. Taipei, 28.06.2022-30.06.2022]
Způsob prezentace: Prezentace
Pořadatel akce: National Taiwan University in Taipei
Grant CEP: GA ČR(CZ) GC19-23760J
Institucionální podpora: RVO:67985858
Klíčová slova: gas transport * capillary condensation * Joule-Thomson process
Obor OECD: Chemical process engineering

The transport of vapors of isobutane near saturation through multi-layered, asymmetric ceramic membranes is investigated experimentally and theoretically. The membranes consist of three to five layers. The pore size of the support is 3 μm, the separation layer has a pore size of 15 nm. The membranes are in the form of plane, circular disks, which have a thickness of 1 mm and a diameter of about 2 cm. The mass flux is measured in a steady-state permeation experiment, varying the upstream and downstream pressures, but keeping the pressure difference constant. For a vapor close to saturation, the mass flux is increased by a factor of up to two with respect to the mass flux of a vapor far from saturation. Also, for a vapor close to saturation, the orientation of the membrane with respect to the flow direction plays a role [1-2]. For a vapor close to saturation the mass flux is increased for the flow direction from the separation layer to the support, but for the opposite direction the increase of flow begins later and is not so obvious. The transport process is described accounting for capillary condensation and either assuming isothermal flow or considering the heat transfer due to condensation and evaporation and assuming adiabatic or diabatic conditions. A comparison with the experimental data does not yield a conclusive result, whether heat transfer must be taken into account to correctly describe the flow process.

Trvalý link: https://hdl.handle.net/11104/0343752