Study on nitrogen fixation performance and mechanism analysis of dielectric barrier discharge under different operating parameters

被引：0
|
作者：
Liu K. [1 ]
Yin Y. [1 ]
Geng W. [1 ]
Xia H. [1 ]
机构：
[1] College of Electrical Engineering, Chongqing University, Chongqing
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 09期
关键词：
dielectric barrier discharge; gas; gas phase product; nitrogen fixation; nitrogen oxides; reaction; reactors;
D O I：
10.11949/0438-1157.20220693
中图分类号：
学科分类号：
摘要：
Dielectric barrier discharge (DBD) is a typical low-temperature gas discharge plasma method, which can generate a large area of discharge plasma under mild conditions for nitrogen fixation, and has the characteristics of green environmental protection, high efficiency and energy saving. The energy consumption for nitrogen fixation of DBD on the high side, however, has a large optimization space. The influence of regulated voltage and gas flow rate on performance of DBD nitrogen fixation was explored to investigate the variation of total nitrogen concentration (TNC) and energy consumption (EC) in the form of liquid nitrogen fixation. Besides, the reaction mechanism of DBD nitrogen fixation was revealed by analyzing the variation rule of DBD gas phase products. It was found that DBD gaseous phase products under different conditions were in one of the three modes of ozone mode, transition mode and nitrogen oxide mode, and the minimum EC of each experimental group were all in transition mode. The reason was analyzed that NO2 and N2O5 could be effectively generated under this mode, which improved the proportion of soluble nitrogen and thus promoted the nitrogen fixation effect. The minimum value of EC is 31.69 MJ/mol when the voltage is 18 kV and the gas flow is 8 L/min. © 2022 Chemical Industry Press. All rights reserved.
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页码：4045 / 4053
页数：8
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