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Preparation of zeolite NaA membranes on the inner side of tubular supports by means of a controlled seeding technique

Pera-Titus, Marc, Llorens, Joan, Cunill, Fidel, Mallada, Reyes and Santamaría, Jesús 2005. Preparation of zeolite NaA membranes on the inner side of tubular supports by means of a controlled seeding technique. Catalysis Today 104 (2-4) , pp. 281-287. 10.1016/j.cattod.2005.03.042

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Abstract

Zeolite NaA membranes have been reproducibly prepared by seeded hydrothermal synthesis on the internal surface of porous α-alumina tubular supports. A cross-flow filtration technique has been developed to allow a controlled seeding of zeolite NaA crystals from a suspension according to transmembrane pressure, pH, seed suspension flow rate, crystal size and concentration. The optimal seeding weight gain was found to be around 0.40 mg cm−2 of membrane area. With this procedure, zeolite membranes with selectivities up to 600 at fluxes of 0.50 kg m−2 h−1 were obtained in the pervaporation of 92:8 wt.% ethanol/water mixtures at 323 K.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Elsevier
ISSN: 0920-5861
Last Modified: 07 Oct 2020 13:00
URI: http://orca.cardiff.ac.uk/id/eprint/135363

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