Počet záznamů: 1
Separation of Methanol-Dimethyl Carbonate Vapour Mixtures with PDMS and PTMSP Membranes.
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SYSNO ASEP 0507135 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Separation of Methanol-Dimethyl Carbonate Vapour Mixtures with PDMS and PTMSP Membranes. Tvůrce(i) Vopička, O. (CZ)
Pilnáček, Kryštof (UCHP-M)
Friess, K. (CZ)Zdroj.dok. Separation and Purification Technology. - : Elsevier - ISSN 1383-5866
Roč. 174, MAR 1 (2017), s. 1-11Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova vapour permeation ; dimethyl carbonate ; mass spectroscopy 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 000389091700001 EID SCOPUS 84991738537 DOI 10.1016/j.seppur.2016.09.041 Anotace In this work, we report on the permeation of methanol and dimethyl carbonate (DMC) vapour mixtures through dense membranes made from cross-linked polydimethylsiloxane (PDMS) and from poly[(trimethylsilyl)propyne] (PTMSP). Since methanol forms a methanol-rich pressure-maximum azeotrope with dimethyl carbonate, vapour permeation through hydrophobic (DMC selective) membranes is presumably a favourable method of azeotrope breaking. Permeation of vapours of pure compounds and of binary vapour mixtures was measured at 40 °C for a series of feed mixture compositions. Both membranes showed practically constant permeabilities of both studied compounds, thus indicating that no significant coupling of fluxes occurred. The membrane prepared from PTMSP was ca. 2–5 times more permeable and showed higher separation factors (αDMC ⩽ 4.2) than the one prepared from PDMS (αDMC ⩽ 2.8). In the case of the PDMS, the separation factors decreased with the increasing dilution of the feed mixtures with inert gas (hydrogen). Conversely, the separation factors increased with increasing feed mixture dilution in the case of PTMSP. The highest separation factors were observed near the azeotrope composition for both polymers (ca. 82 mol.% of methanol), thus enabling the development of effective hybrid processes combining rectification columns and vapour permeation units. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2020 Elektronická adresa http://hdl.handle.net/11104/0298195
Počet záznamů: 1