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- Title
Plasma Nitrogen Fixation: NO<sub>x</sub> Synthesis in MnO<sub>x</sub>/Al<sub>2</sub>O<sub>3</sub> Packed-Bed Dielectric Barrier Discharge.
- Authors
Zhang, Tian-Qi; Li, Xiao-Song; Liu, Jing-Lin; Wen, Xiao-Qiong; Zhu, Ai-Min
- Abstract
The plasma nitrogen fixation for NOx synthesis from N2 and O2 in MnOx/Al2O3 packed-bed dielectric barrier discharge (DBD) and an enhanced effect of MnOx/Al2O3 catalyst are reported. At N2 content of 50% and SEI of ~ 16 kJ/mol (flow rate of 800 SCCM and discharge power of ~ 9.5 W), NOx production rates are 0.28 SCCM for Al2O3 and 0.42 SCCM for MnOx/Al2O3, and improved by ~ 60% due to the enhanced effect of MnOx/Al2O3. The enhanced effect becomes more significant at lower specific energy input (SEI) or higher N2 content (lower O2 content). The MnOx/Al2O3-packed DBD features much more and lower-intensity micro-discharges, larger total capacitance, greater peak-to-peak charge, and higher vibrational temperature of N2 than the Al2O3-packed DBD. The surface role of MnOx/Al2O3 catalyst in the enhanced effect was disclosed by two-step surface reaction processes and in-situ temperature programed desorption for the adsorbed species of the first step.
- Subjects
NITROGEN plasmas; DIELECTRICS; SURFACE reactions; NITROGEN fixation; NITROGEN; HIGH temperatures
- Publication
Plasma Chemistry & Plasma Processing, 2023, Vol 43, Issue 6, p1907
- ISSN
0272-4324
- Publication type
Article
- DOI
10.1007/s11090-023-10345-8