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A study on immobilization of 14CO2 using inorganic materials

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Abstract

Activated carbon wastes from the air cleaning system in a nuclear facility contain a long half-life value of 14C (5700 years). This 14C is converted into a gaseous form of 14CO2 during a treatment process of the activated carbon wastes, and it is vented with a considerable amount of CO2 gas. This CO2 gas must be immobilized in a stable waste form with a minimized volume for final disposal. For this reason, carbonation tests of CO2 were conducted in accelerated CO2 carbonation equipment using Ca(OH)2, and fabrication tests of the CO2 carbonation products into a waste form were performed using a low melting glass in this study. Through the carbonation tests, an optimal condition was determined to achieve a high CaCO3 production rate (214 kg/m3 h). In the fabrication tests, it was confirmed that the carbonation product can be fabricated into a homogenous glass-ceramic waste form with a high density (3.1 g/cm3) at 450 °C by using a low melting glass with the Bi2O3–B2O3–ZnO–SiO2 system.

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Acknowledgements

The authors would like to express their appreciation for the support provided by the National Research Foundation of Korea (NRF), which is funded by the Ministry of Science, ICT and Future Planning (MSIP) of the Republic of Korea (NRF- 2017M2A8A5015147).

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Authors and Affiliations

  1. Decommissioning Technology Research Division, Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon, 34057, Republic of Korea

    Hee-Chul Eun, Hee-Chul Yang, Hyung-Ju Kim, Keun-Young Lee & Bum-Kyoung Seo

  2. Quantum Energy Chemical Engineering, University of Science and Technology, Gajeong-ro 217, Yuseong-gu, Daejeon, 34113, Republic of Korea

    Hee-Chul Eun

  3. Department of Chemical Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul, Republic of Korea

    Sung-Jun Kim

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  1. Hee-Chul Eun
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Eun, HC., Yang, HC., Kim, HJ. et al. A study on immobilization of 14CO2 using inorganic materials. J Radioanal Nucl Chem 328, 627–635 (2021). https://doi.org/10.1007/s10967-021-07681-4

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  • DOI: https://doi.org/10.1007/s10967-021-07681-4

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