Multi-stage synthesis of magnesium nitride using an atmospheric-pressure dielectric barrier discharge

Shungo Zen^*, Yingwen Huang, Nozomi Takeuchi

^* The author to whom correspondence should be addressed.

Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, 2-12-1-S3-3, Ookayama, Meguro-ku, Tokyo, Japan

Abstract

A multi-stage dielectric barrier discharge (DBD) was used to elucidate the reaction pathway for synthesizing Mg₃N₂ from MgO, nitrogen, and hydrogen using atmospheric pressure plasma. Recently, ammonia has been considered as a promising carbon-free material for hydrogen storage and carrier owing to its high hydrogen density. However, the extensive use of ammonia as an energy carrier has problems with respect to transportation and storage because of its toxicity, odor, and combustibility. Therefore, we consider that Mg₃N₂ can solve these problems and focus on Mg₃N₂ synthesis by nitridation of MgO using a DBD in a N₂ and H₂ atmosphere instead of directly synthesizing ammonia. By investigating the Mg₃N₂ synthesis pathway using a multi-stage atmospheric pressure plasma, it is considered that H atoms and NH radicals reduce MgO and promote nitriding.

Keywords - Ammonia carrier, dielectric barrier discharge, Mg₃N₂ synthesis, non-thermal plasma.

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