Počet záznamů: 1
Consideration of the Joule-Thomson Effect for the Transport of Vapor through Anodic Alumina Membranes under Conditions of Capillary Condensation.
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SYSNO ASEP 0507676 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Consideration of the Joule-Thomson Effect for the Transport of Vapor through Anodic Alumina Membranes under Conditions of Capillary Condensation. Tvůrce(i) Loimer, T. (AT)
Setničková, Kateřina (UCHP-M) RID, ORCID, SAI
Uchytil, Petr (UCHP-M) RID, SAIZdroj.dok. Separation and Purification Technology. - : Elsevier - ISSN 1383-5866
Roč. 215, MAY 15 (2019), s. 548-556Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova mass flow ; inorganic membranes ; porous media Vědní obor RIV CI - Průmyslová chemie a chemické inženýrství Obor OECD Chemical process engineering Způsob publikování Omezený přístup Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000458941900058 EID SCOPUS 85060433542 DOI 10.1016/j.seppur.2019.01.051 Anotace Anodic alumina membranes have straight pores and a very uniform pore size distribution. Data on the permeance for the flow of isobutane vapors through anodic alumina membranes with pore diameters between 20 nm and 90 nm has been reported recently [Petukhov et al., J. Phys. Chem. C 120, 10982-10990, 2016]. For the upstream pressure approaching the saturation pressure, a sudden increase of the permeance was observed. Taking into account capillary condensation and assuming isothermal conditions within the entire flow field, the permeance data was used to compute the radii of curvature of the menisci separating the liquid condensate from the vapor.
In the present work, the radius of curvature of the meniscus within the membrane is assumed to be known and kept fixed. From that, the expected permeance is computed employing three different descriptions. These are (i) a well known isothermal description, as also used by Petukhov et al. (2016), and two non-isothermal descriptions for which the energy balance is taken into account and (ii) an adiabatic or (iii) a diabatic boundary condition is applied at the downstream front of the membrane. These two latter descriptions correspond to no heat flux or arbitrarily large heat flux from downstreams to the downstream front of the membrane, respectively.
The predicted permeances depend significantly on the chosen description. A comparison with experimental data indicates that a description with heat flux towards the downstream front of the membrane could agree best with data. However, the conclusion is that a determination of the radius of curvature of the meniscus within the membrane from permeance data alone is uncertain. Accurate temperature measurements at the upstream and downstream fronts of the membrane would increase the reliability of the determination of the radius of curvature of the meniscus within the membrane.
Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2020 Elektronická adresa http://hdl.handle.net/11104/0298659
Počet záznamů: 1