377746 Packed Bed Packets, Effective Thermal Conductivity and Advantage of in-Situ W ALD

Tuesday, November 18, 2014
Galleria Exhibit Hall (Hilton Atlanta)
Staci A. Van Norman1, Jeni Sorli1, Ronggui Yang2, Joseph W. Tringe3, John D. Sain3, John L. Falconer1 and Alan W. Weimer1, (1)Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, CO, (2)Mechanical Engineering, University of Colorado at Boulder, Boulder, CO, (3)Lawrence Livermore National Lab

Tungsten is added to a porous structure in order to increase the effective thermal conductivity (keff) of the starting material and surpass the keff of a packed Al2O3 catalyst support.  The conformal self-limited ALD reaction maintains porous properties of the starting material, preserves surface area of the catalyst support, and improves thermal conductivity.  In-situ W ALD of 25 cycle’s deposit uniformly throughout a packed bed of porous particles and particle internal volume and display increased keff.  An original sample preparation technique was used for measuring thermal conductivity of packed beds coated by ALD.

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