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Journal of ZheJiang University (Engineering Science)  2022, Vol. 56 Issue (6): 1206-1211    DOI: 10.3785/j.issn.1008-973X.2022.06.019
Direct nitrogen fixation by air oxidation catalyzed based on magnetic rotating sliding arc plasma
Xing-jie LV(),Hang CHEN,Ang-jian WU*(),Xiao-dong LI
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
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Three kinds of MoO3/Al2O3 catalysts with different mass fractions (5%, 7.5% and 10%) were prepared by impregnation method using activated alumina (γ-Al2O3) as the carrier, and they were used for the research of plasma-catalyzed air oxidation and nitrogen fixation. In order to investigate the structural differences of catalysts with different mass fractions, the physical properties of the catalysts were characterized by XRD, SEM, and TEM. It was found that the catalyst structure was stable and distributed uniformly, which was beneficial to the catalytic experiment. The prepared MoO3/Al2O3 catalyst was used to carry out a magnetically rotating gliding arc plasma-coupled catalytic air nitrogen fixation experiment, and experiment results showed that the catalyst had a promoting effect on nitrogen fixation. Under the optimal conditions, the output rate of ${{\text{NO}}_{{x}}}^{{-}}$ reached up to 1.17 mmol/min. Compared with the highest nitrogen fixation efficiency of 985 μmol/min in similar studies, it was slightly improved.

Key wordsmagnetic rotating sliding arc      MoO3/Al2O3 catalysts      plasma coupling catalysis      air oxidation nitrogen fixation      plasma activated water     
Received: 23 July 2021      Published: 30 June 2022
CLC:  TK 01+9  
Fund:  国家自然科学基金资助项目(51976191,51806193)
Corresponding Authors: Ang-jian WU     E-mail:;
Cite this article:

Xing-jie LV,Hang CHEN,Ang-jian WU,Xiao-dong LI. Direct nitrogen fixation by air oxidation catalyzed based on magnetic rotating sliding arc plasma. Journal of ZheJiang University (Engineering Science), 2022, 56(6): 1206-1211.

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以活性氧化铝(γ-Al2O3)为载体通过浸渍法制备不同质量分数(5%、7.5%和10%)的MoO3/Al2O3催化剂,并进行等离子体催化空气的氧化固氮研究. 为了考察不同质量分数催化剂的结构差异,分别采用XRD、SEM和TEM表征催化剂的物理性质,结果表明催化剂结构稳定、分布均匀,有利于催化实验. 利用制备的MoO3/Al2O3催化剂进行磁旋滑动弧等离子体耦合催化空气固氮实验,结果表明制备催化剂对固氮有促进作用,在最佳工况下, ${ {\text{NO}}_{{x}}}^{{-}}$的产出速率最高为1.17 mmol/min,相比同类研究中最高固氮效率 985 μmol /min有些许提升.

关键词: 磁旋滑动弧,  MoO3/Al2O3催化剂,  等离子体耦合催化,  空气氧化固氮,  等离子体活化水 
Fig.1 Magnetic rotating sliding arc coupling catalytic experiment system
Fig.2 Schematic diagram of catalytic bed layout
Fig.3 XRD patterns of MoO3/Al2O3 with different mass fractions
Fig.4 MoO3/Al2O3 SEM of 5% mass fraction
Fig.5 MoO3/Al2O3 TEM of 10% mass fraction
Fig.6  ${{\mathrm{N}\mathrm{O}}_{x}}^{-}$ concentration in plasma activated water under different experimental conditions
Fig.7 Effect of plasma coupled catalytic nitrogen fixation with different mass fractions of MoO3/Al2O3
Fig.8  ${{\mathrm{N}\mathrm{O}}_{x}}^{-}$concentration in plasma activated water and gas absorption bottle under different catalytic conditions
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