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Decomposition of Trimethylamine by an Electron Beam

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Abstract

To identify the decomposition characteristics of trimethylamine (TMA) by electron beam (EB), we conducted an experiment based on process parameters, including absorbed dose (2.5–10 kGy), background gas (air, O2, N2 and He), water content (1,200, 14,300, and 27,500 ppm), initial concentration (50, 100, and 200 ppm) and reactor type (batch or continuous flow system). Air background gas showed a maximum TMA removal efficiency of 86 % at 10 kGy and that was the highest efficiency of all background gases. Energy efficiencies were higher when the absorbed dose was lower (e.g., 2.5 kGy). Decomposition efficiencies of all initial TMA concentrations were approximately >90 % at 10 kGy. Removal efficiencies increased up to 30 % as water vapor increased. As a by-product, it is observed that CH3 radical formed by EB irradiation was converted into CH4 by reaction with residual TMA, (CH3)2NH, and H. These results suggest that EB technology can be applied for TMA treatment under low concentration and high flow rate conditions.

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Acknowledgments

This study was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology (2012R1A6A3A03039668). This study was also supported by the Korean Ministry of Environment as part of “The Eco-Technopia 21 Project”.

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Correspondence to Jo-Chun Kim.

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Son, YS., Kim, P., Park, J.H. et al. Decomposition of Trimethylamine by an Electron Beam. Plasma Chem Plasma Process 33, 1099–1109 (2013). https://doi.org/10.1007/s11090-013-9479-z

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  • DOI: https://doi.org/10.1007/s11090-013-9479-z

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