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DOE OSTI · 1902316

Scalable synthesis of supported catalysts using fluidized bed atomic layer deposition

Lu, Zheng·Yanguas-Gil, Angel·Kang, Donghyeon·Darapaneni, Pragathi·Mane, Anil U.·Marshall, Christopher L.·Elam, Jeffrey W.
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Abstract

Overcoating layers deposited on the surface of heterogeneous catalysts using atomic layer deposition (ALD) have been shown to increase catalyst activity, lifetime, and selectivity. In this study, we performed Al 2 O 3 ALD and Pd ALD in a commercial fluidized bed reactor on high surface area mesoporous powder supports to create overcoated catalysts with high precursor utilization. We investigated the reaction mechanism for both Al 2 O 3 ALD and Pd ALD using in situ mass spectrometry and developed a mathematical model to understand the precursor saturation behaviors. We characterized the catalyst samples using a variety of techniques to measure the surface area, porosity, composition, and surface chemistry of the overcoated catalysts. Finally, we used propane dehydrogenation as a probe reaction to evaluate the performance of the catalysts prepared by fluidized bed ALD.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYAtomic Layer Deposition (ALD)Atomic layer depositionCatalysts and CatalysisDehydrogenationFluidized bedsMass spectrometryMathematical modelingNanoparticlesPorous mediaReaction mechanismsSurface and interface chemistry

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Lu, Zheng, Yanguas-Gil, Angel, Kang, Donghyeon, Darapaneni, Pragathi, Mane, Anil U., Marshall, Christopher L., Elam, Jeffrey W.. 2022-06-13. Scalable synthesis of supported catalysts using fluidized bed atomic layer deposition. https://doi.org/10.1116/6.0001891

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