Magnetic field stabilized atmospheric pressure plasma nitrogen fixation: Effect of electric field and gas temperature

Author:

Li Zhiyu1ORCID,Wu Erqi1,Nie Lanlan1ORCID,Liu DaWei1ORCID,Lu Xinpei1ORCID

Affiliation:

1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology , Wuhan, Hubei 430074, People's Republic of China

Abstract

In this paper, we investigate the influence of plasma characteristics on nitrogen fixation efficiency and explore the optimization of discharge parameters by utilizing a magnetic field stabilized atmospheric pressure plasma. The gas temperature and electric field of the plasma are maintained at a constant level and can be independently adjusted by controlling the discharge current, gas flow rate, and external magnetic field. The spatial distribution of the gas temperature of the plasma is measured by laser-induced Rayleigh scattering. The results show that reducing the electric field and gas temperature leads to an increase in NOx production. The optimal parameters for nitrogen fixation are identified as a discharge current of 55 mA, a gas flow rate of 6 l·min−1, and an O2 fraction of 40%. These settings result in the lowest recorded energy cost of 2.29 MJ·mol−1 and a NOx concentration of approximately 15 925 ppm. The stable characteristics of the magnetically stabilized atmospheric pressure plasma make it suitable for further investigations into the effect of plasma characteristics on nitrogen fixation.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Publisher

AIP Publishing

Subject

Condensed Matter Physics

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