Preparation of stable MCM-48 tubular membranes |
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| Authors: | M Pedernera O de la Iglesia R Mallada Z Lin J Rocha J Coronas J Santamaría |
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| Institution: | 1. Planta Piloto de Ingeniería Química – UNS-CONICET, Bahía Blanca, Argentina;2. Departamento de Ingeniería Química y Tecnologías del Medio Ambiente – Universidad de Zaragoza, España, Spain;3. Department of Chemistry, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal |
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| Abstract: | Stable mesoporous membranes with a cubic structure, based on the MCM-48 material, were successfully prepared on alumina supports by hydrothermal synthesis, starting from sols having both CTABr and TPAOH structure directing agents. The inclusion of a zeolite (MFI-type) precursor during membrane synthesis led to partial zeolite incorporation into the porous structure, giving rise to a hydrothermally stable membrane. The mean pore diameter of the membrane was 2.5 nm, and permeation experiments confirmed that transport across the membrane was governed by Knudsen diffusion and that there were no pinholes. |
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| Keywords: | Mesoporous membranes MCM-48 Hydrothermal stability Zeolite Organic/permanent gas separation |
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