광학측정기술을 이용한 OH 라디칼 모니터링 기술 연구

전민규^*

Associate professor, Dept. of Mechanical System Engineering, Republic of Korea Naval Academy

A Study on Monitoring OH Radicals Using Optical Measurement Techniques

Min-Gyu Jeon^*

해군사관학교 기계시스템공학과 부교수

Correspondence to: ^*Min-Gyu Jeon Dept. of Mechanical System Engineering, Republic of Korea Naval Academy 1 Jungwon-ro, Jinhae-gu, Changwon-si, Gyungsangnam-do, 51704, Republic of Korea Tel: +82-55-907-5335 E-mail: mgjeon@navy.ac.kr

초록

2030년까지 온실가스 배출량을 40 % 이상 감축하기 위해서는 대기 중 메탄 수명을 정확히 예측하는 것이 중요하다. 메탄은 OH 라디칼과 반응해 분해되며, 이는 지구 복사 균형에 영향을 미친다. 그러나 OH 라디칼은 반응성이 크고 수명이 짧아 측정이 어렵다. 기존 분광법은 감도와 복잡성에 한계가 있다. 본 연구는 TDLAS를 활용해 OH 라디칼을 정밀 측정하고, SD-LBC 기법을 이용하여 흡광도 분석 향상을 도모한다.

Abstract

Monitoring atmospheric methane is essential to achieve a 40 % emission reduction by 2030. Methane reacts with hydroxyl (OH) radicals, which help purify air and influence radiative balance. However, their high reactivity and short lifetime make OH radicals hard to detect. Existing methods like absorption spectroscopy and laser-induced fluorescence face limitations. This study employs tunable diode laser absorption spectroscopy (TDLAS) and SD-LBC to improve measurement accuracy.

Keywords:

OH Radical Detection, Methane Oxidation, SD-LBC, Atmospheric Monitoring, TDLAS

키워드:

OH 라디칼 검출, 메탄 산화, 표준편차-선형기준수정, 대기 모니터링, 가변 다이오드 레이저 흡수 분광법

Acknowledgments

본 논문은 2025년 해군사관학교 해양연구소 학술연구과제 연구비의 지원으로 수행된 연구임.

References

Q. Xiong, A. Yu, Nikiforov, L. Li, P. Vanraes, N. Britun, R. Snyders, X. P. Lu, C. Leys, “Absolute OH Density Determination by Laser Induced Fluorescence Spectroscopy in an Atmospheric Pressure RF Plasma Jet,” Eur. Phys. J. D, Vol. 66, 281, 2012. [https://doi.org/10.1140/epjd/e2012-30474-8]
I. Y. Chen, C. W. Chang, C. Fittschen, P. L. Luo, “Accurate Kinetic Studies of OH + HO₂ Radical–Radical Reaction through Direct Measurement of Precursor and Radical Concentrations with High-Resolution Time-Resolved Dual-Comb Spectroscopy,” J Phys Chem Lett, Vol. 15, No. 14, pp. 3733-3739, 2024. [https://doi.org/10.1021/acs.jpclett.4c00494]
N. Yang, B. Fang, W. Zhao, C. Wang, F. Cheng, X. Hu, Y. Chen, W. Zhang, W. Ma, G. Zhao, W. Chen, “Optical-feedback Cavity-enhanced Absorption Spectroscopy for OH Radical Detection at 2.8 ㎛ Using a DFB Diode Laser,” Optics Express, Vol. 30, No. 9, pp. 15238-15249, 2022. [https://doi.org/10.1364/OE.456648]
B. Bottorff, E. Reidy, L. Mielke, S. Dusanter, P. S. Stevens, “Development of a Laser-photofragmentation Laser-induced Fluorescence Instrument for the Detection of Nitrous Acid and Hydroxyl Radicals in the Atmosphere,” Atmospheric Measurement Techniques, Vol. 14, No. 9, pp. 6039-6056, 2021. [https://doi.org/10.5194/amt-14-6039-2021]
C. Cho, A. Hofzumahaus, H. Fuchs, H. P. Dorn, M. Glowania, F. Holland, F. Rohrer, V. Vardhan, A. Kiendler-Scharr, A. Wahner, A. Novelli, “Characterization of a Chemical Modulation Reactor (CMR) for the Measurement of Atmospheric Concentrations of Hydroxyl Radicals with a Laser-induced Fluorescence Instrument,” Atmospheric Measurement Techniques, Vol. 14, No. 3, pp. 1851‒1877, 2021. [https://doi.org/10.5194/amt-14-1851-2021]
J. K. Magnuson, T. N. Anderson, R. P. Lucht, “Application of a Diode-laser-based Ultraviolet Absorption Sensor for in situ Measurements of Atomic Mercury in Coal-combustion Exhaust,” Energy and Fuels, Vol. 22, No. 5, pp. 3029-3036, 2008. [https://doi.org/10.1021/ef800372k]
T. Kamimoto, Y. Deguchi, Y. Kiyota, “High Temperature Field Application of Two Dimensional Temperature Measurement Technology Using CT Tunable Diode Laser Absorption Spectroscopy,” Flow Measurement and Instrumentation, Vol. 46, No. A, pp. 51-57, 2015. [https://doi.org/10.1016/j.flowmeasinst.2015.09.006]
D. W. Choi, M. G. Jeon, G. R. Cho, T. Kamimoto, Y. Deguchi, D. H. Doh, “Performance Improvements in Temperature Reconstructions of 2-D Tunable Diode Laser Absorption Spectroscopy (TDLAS),” Journal of Thermal Science, Vol. 25, No. 1, pp. 84-89, 2016. [https://doi.org/10.1007/s11630-016-0837-z]
M. G. Jeon, Y. Deguchi, T. Kamimoto, D. H. Doh, G. R. Cho, “Performances of New Reconstruction Algorithms for CT-TDLAS(Computer Tomography-tunable Diode Laser Absorption Spectroscopy),” Applied Thermal Engineering, Vol. 115, pp. 1148-1160, 2017. [https://doi.org/10.1016/j.applthermaleng.2016.12.060]
M. G. Jeon, D. H. Doh, Y. Deguchi, “Measurement Enhancement on Two-dimensional Temperature Distribution of Methane-Air Premixed Flame Using SMART Algorithm in CT-TDLAS”, Applied Sciences, Vol. 9, No. 22, 4955, 2019. [https://doi.org/10.3390/app9224955]
M. G. Jeon, J. W. Hong, D. H. Doh, Y. Deguchi, “A Study on Two-dimensional Temperature and Concentration Distribution of Propane-Air Premixed Flame Using CT-TDLAS,” Modern Physics Letters B, Vol. 34, No. 7n9, 2040020, 2020. [https://doi.org/10.1142/S0217984920400205]
M. Li, L. Bai, S. Jiang, M. Sillanpaa, Y. Huang, Y. Liu, “Electrocatalytic Transformation of Oxygen to Hydroxyl Radicals via Three-electron Pathway Using Nitrogen-doped Carbon Nanotube-encapsulated Nickel Nanocatalysts for Effective Organic Decontamination,” Journal of Hazardous Materials, Vol. 452, No. 15, 131352, 2023. [https://doi.org/10.1016/j.jhazmat.2023.131352]