New synthesis routes for thin oriented zeolite membranes

FUEL 178

Henk Verweij, Verweij@matsceng.ohio-state.edu1, Tatsiana Kuzniatsova, T.Kuzniatsova@gmail.com1, William V. Chiu, chiu@ecr6.ohio-state.edu1, Matthew L. Mottern, mottern@matsceng.ohio-state.edu1, Yanghee Kim, yakim@chemistry.ohio-state.edu2, Jeremy C. White2, Krenar Shqau, shqau@matsceng.ohio-state.edu1, and Prabir K. Dutta, dutta@chemistry.ohio-state.edu2. (1) Department of Material Science and Engineering, The Ohio State University, 2041 N. College Road, Columbus, OH 43210, (2) Department of Chemistry, The Ohio State University, 120 W 18th Avenue, Columbus, OH 43210
Continuous and largely oriented supported zeolite membranes were prepared according to a two step hydrothermal synthesis that starts with the deposition of oriented single crystal seeds. Mono-crystalline sub-μm-sized zeolite seeds were deposited on a smooth macro-porous support with one zeolite crystal face aligned with the support surface. This treatment was followed by epitaxial secondary growth of the zeolites to form an oriented 1…5 μm thick continueous zeolite layer. The conditions for seed deposition were optimized by varying the zeolite fraction in the deposition dispersion, as well by tailoring the surface chemistry of the support and the zeolite. The homogeneity and morphology of deposits and membranes before and after secondary growth were characterized by SEM and TEM of perpendicular FIB cross-sections of the supported films. The absence of connected meso-defects was confirmed with permeation porometry. Single gas permeation and gas separation studies were used to characterize gas transport properties of the membrane micro-pore system.
 

Inorganic Membranes for Energy and Environmental Applications
1:00 PM-6:00 PM, Tuesday, August 21, 2007 Boston Park Plaza -- Chartes River Room, Oral

Division of Fuel Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007