Super/Subcritical Fluid Extractions for Synthesis of Porous Metal Oxides

0347302 - ÚCHP 2011 CZ eng C - Konferenční příspěvek (zahraniční konf.)
Matějová, Lenka - Matěj, Z. - Cajthaml, Tomáš - Šolcová, Olga
Super/Subcritical Fluid Extractions for Synthesis of Porous Metal Oxides.
Summaries 2. Praha: Process Engineering Publisher, 2010, s. 780. ISBN 978-80-02-02247-3.
[International Congress of Chemical and Process Engineering CHISA 2010 and 7th European Congress of Chemical Engineering ECCE-7 /19./. Prague (CZ), 28.08.2010-01.09.2010]
Grant CEP: GA ČR GP104/09/P290; GA AV ČR IAA400720701
Výzkumný záměr: CEZ:AV0Z40720504
Klíčová slova: metal oxide * supercritic fluid extraction * subcritic water extraction
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
www.chisa.cz/2010, www.ecce7.com

In this study the influence of individual post-treatment steps on the crystallinity, purity and textural properties of prepared metal oxides - TiO2, ZrO2, TiO2-ZrO2 etc. in powdery form (aerogels) – has been studied. Titania and zirconia organogels were prepared as reaction semi-products of the sol-gel process controlled in reverse micellar solution of nonionic surfactant Triton X-114. in combination with a) subcritical fluid extractions (using water and subsequently methanol like pressurized solvents, SubWE/PFE) and b) calcination. The effect of various extraction conditions on textural and structural properties of metal oxides has been investigated. Besides that the reproducibility of these material properties has been also observed.
Trvalý link: http://hdl.handle.net/11104/0188107