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Integrity of Alumina Catalytic Support Prepared by Anodization in a High Temperature Steam Environment

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Abstract

As a catalytic support for passive autocatalytic recombiner in nuclear power plants, anodic alumina layer was formed on stainless steel 304 by applying either Al or NiAl diffusion coatings on 304SS, followed by anodization and calcination. The anodic alumina had porous and nano-fibrous morphology and showed comparable hydrogen conversion ratio as the conventional wash-coated catalytic support. Integrity of catalytic supports was evaluated by steam oxidation test at 900 °C for 100 h. The wash-coated catalytic support exhibited oxide breakaway and Fe-oxide formation. On the other hand, α-alumina was formed on anodized catalytic support with Al or NiAl diffusion layers, which showed good adherence to the underlying metal substrate.

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Acknowledgements

This study was supported by the MOTIE/KETEP of the Republic of Korea (No. 20151520101050). Financial support for three of the authors was provided by the BK-Plus Program of the MSIP/NRF of the Republic of Korea.

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Authors and Affiliations

  1. Dept. of Nuclear and Quantum Enigineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea

    Chaewon Kim, Sung Hwan Kim, Gokul Obulan Subramanian & Changheui Jang

  2. Korea Nuclear Technology Co., Ltd., Daejeon, 34036, Republic of Korea

    Keun Man Park

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  1. Chaewon Kim
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  2. Sung Hwan Kim
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  3. Gokul Obulan Subramanian
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  4. Changheui Jang
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Correspondence to Changheui Jang.

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Kim, C., Kim, S.H., Obulan Subramanian, G. et al. Integrity of Alumina Catalytic Support Prepared by Anodization in a High Temperature Steam Environment. Met. Mater. Int. 25, 324–332 (2019). https://doi.org/10.1007/s12540-018-0198-0

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  • DOI: https://doi.org/10.1007/s12540-018-0198-0

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