4.6 Article

Numerical analysis of nitrogen fixation by nanosecond pulse plasma

期刊

出版社

IOP Publishing Ltd
DOI: 10.1088/1361-6463/abdf99

关键词

electron heating; nitrogen fixation; pulsed DC discharge; plasma chemistry

资金

  1. National Natural Science Foundation of China [12005076, 51777087]
  2. China Postdoctoral Science Foundation [2020M682389]

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This study presents a unique approach on optimizing the efficiency of NTP-NF through developing a novel nanosecond pulse driving PB-DBD model based on precise studies of plasma dynamics and chemistry. The results show that selectively enhancing the energy of electronically excited dissociation to produce N* is the most efficient way to increase the production of NO in nonthermal plasma. Plasma dynamics indicate that high instantaneously applied power determines the development of ionization waves and NO production.
Nonthermal plasma (NTP) provides a novel approach to developing renewable and efficient nitrogen fixation (NF) technology. However, the efficiency optimization of NTP-assisted NF (NTP-NF) remains challenging due to the elusive ultra-fast plasma process, especially in packed-bed dielectric barrier discharge (PB-DBD). Our work presents a unique view on how to optimize the efficiency of NTP-NF based on precise studies of plasma dynamics and chemistry by developing a novel nanosecond pulse driving PB-DBD model. 2D plasma dynamics show that the plasma propagates in the form of surface ionization waves coupled with filamentary micro-discharge. Electron heating by high instantaneously applied power determines the development of ionization waves and NO production. Plasma chemistry shows that selectively enhancing the energy of electronically excited dissociation to produce N* is the most efficient way to increase the production of NO.

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