The Flow of Butane and Isobutene Vapors Near Saturation Through Porous Vycor Glass Membranes

0367224 - ÚCHP 2012 RIV NL eng J - Journal Article
Loimer, T. - Uchytil, Petr - Petričkovič, Roman - Setničková, Kateřina
The Flow of Butane and Isobutene Vapors Near Saturation Through Porous Vycor Glass Membranes.
Journal of Membrane Science. Roč. 383, 1-2 (2011), s. 104-115. ISSN 0376-7388. E-ISSN 1873-3123
R&D Projects: GA ČR GA104/09/1165; GA ČR GCP106/10/J038; GA MŠMT ME 889
Grant - others:AIMC GmbH(AT) AES:09/2006
Institutional research plan: CEZ:AV0Z40720504
Keywords : transport processes * porous media * inorganic membranes
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 3.850, year: 2011

The pressures of the vapors upstream of the membrane lie between the saturation pressure and approximately half the saturation pressure. The process is described assuming an adiabatic flow of the fluid. As an important result, the adiabatic description yields a characteristic pore diameter. For upstream pressures close to the saturation pressure and pore diameters smaller than the characteristic value, complete condensation of the fluid and flow of the liquid phase through a part of the membrane is predicted. Under these circumstances, due to the action of capillary pressure, the mass flux is greatly increased with respect to the mass flux of a vapor that does not undergo phase changes. Isothermal descriptions do not yield a characteristic pore diameter. There is qualitative agreement between our description and experimental data with respect to the mass transport. Quantitatively, the agreement is poor to moderate.
Permanent Link: http://hdl.handle.net/11104/0006673