Bulletin of Materials Science

, 32:537

Silicalite-1 zeolite membranes on unmodified and modified surfaces of ceramic supports: A comparative study

Article

DOI: 10.1007/s12034-009-0080-2

Cite this article as:
Naskar, M.K., Kundu, D. & Chatterjee, M. Bull Mater Sci (2009) 32: 537. doi:10.1007/s12034-009-0080-2

Abstract

Silicalite-1 zeolite membranes were prepared hydrothermally on the porous ceramic supports, both unmodified and modified with 3-aminopropyl triethoxysilane (APTES) as a coupling agent following ex situ (secondary) crystal growth process. The microstructure of the membranes was examined by scanning electron microscopy (SEM). The permeation study with a single gas, nitrogen (N2) was performed through the membranes. For the surface modified support, a more surface coverage of the seed crystals on the porous support was observed resulting in a relatively higher dense packing of the crystals during secondary crystal growth process compared to that obtained from the unmodified support. The membrane developed on surface modified support rendered lower permeance value i.e. 9 × 10−7 mol m−2 s−1 Pa−1 of N2 compared to that formed on the unmodified support which gave permeance value of 20 × 10−7 mol m−2 s−1 Pa−1 of N2.

Keywords

Silicalite-1 membranessurface modificationsecondary growthX-ray diffraction (XRD)scanning electron microscopy (SEM)gas permeation

Copyright information

© Indian Academy of Sciences 2009

Authors and Affiliations

  1. 1.Sol-Gel DivisionCentral Glass and Ceramic Research Institute (Council of Scientific and Industrial Research)KolkataIndia