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Poster Session II

4:30 pm – 6:30 pm, Wednesday October 15 Session DW5 COEX, Lobby E
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Direct NO2 formation from N2-O2 supercritical fluid plasma

Poster 72
Presenter: Kyusang Cho (Pohang University of Science and Technology)
Authors: Juho Lee (Pohang University of Science and Technology), Gunsu Yun (Pohang University of Science and Technology)

We demonstrate a direct synthesis of nitrogen dioxide (NO₂) in supercritical nitrogen–oxygen fluid mixtures using laser-produced plasma. A tightly focused nanosecond laser pulse generates a high-density plasma that initiates chemical reactions inaccessible under ambient conditions. Time-resolved emission and absorption spectroscopy confirm the in-situ formation of NO₂, and a parametric study of input energy and gas composition reveals that plasma characteristics play a critical role in determining the reaction outcomes. This one-step process offers a compact and efficient alternative to conventional NO₂ production methods, which typically rely on the catalytic oxidation of ammonia. The use of supercritical fluids provides a unique reaction environment that enables highly selective molecular synthesis. These findings open new opportunities for deployable plasma chemical reactors in contexts such as space exploration and decentralized chemical manufacturing.

Funding acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and ICT (RS-2024-00349684) and partially supported by Glocal University 30 project funded by Ministry of Education.

POSTERS (88)