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

Tungsten is added to a porous structure in order to increase the effective thermal conductivity (k_eff) of the starting material and surpass the k_eff 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 k_eff.  An original sample preparation technique was used for measuring thermal conductivity of packed beds coated by ALD.