A study on immobilization of 14CO2 using inorganic materials
| Autor: | Keun-Young Lee, Hee-Chul Yang, Sung-Jun Kim, Bum-Kyoung Seo, Hyung-Ju Kim, Hee-Chul Eun |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Fabrication
Materials science Waste management Health Toxicology and Mutagenesis Carbonation Treatment process Public Health Environmental and Occupational Health Air cleaning Pollution Analytical Chemistry Nuclear Energy and Engineering Volume (thermodynamics) medicine Radiology Nuclear Medicine and imaging Inorganic materials Spectroscopy Activated carbon medicine.drug Production rate |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 328:627-635 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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