用于将 N2 固定为氮氧化物的介质增压滑动电弧放电

IF 2.6 3区 物理与天体物理 Q3 ENGINEERING, CHEMICAL
Xiangyi Meng, Na Lu, Kefeng Shang, Nan Jiang
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引用次数: 0

摘要

等离子体固氮技术对于解决氮肥资源短缺问题、节能减排、促进农业可持续发展和资源循环利用具有重要意义。为提高二维叶片式滑弧固氮反应的效率和处理能力,采用直径为 50 毫米的石英介质(DBGADΦ50)的介质增压滑弧放电反应器进行 N2 固氮为 NOx 的反应。本研究系统地考察了反应器参数和气体参数对固氮反应的影响。研究结果表明,DBGADΦ50 能显著提高固氮效果。在比输入能量为 2.7 kJ/L 时,电介质增压滑弧气放电产生的氮氧化物浓度是传统滑弧气放电(GAD)的 1.12 倍。利用 DBGADΦ50 反应器,在气体流量为 5.6 L/min 的情况下,能效达到 6.83 g/kW h。适当增加氧气浓度有利于氮氧化物的生成。在 DBGADΦ50 中,当添加的氧气体积分数达到 30% 时,氮氧化物浓度是空气中的 1.33 倍。在石英电介质表面添加 TiO2 催化剂颗粒,形成约 5 毫米厚的催化剂层,可进一步提高性能。在氧气浓度为 30% 的情况下,与不添加催化剂的情况相比,添加了 TiO2 的 DBGADΦ50 反应器的氮氧化物浓度提高了 26%,能效提高了 49%,效率达到 14.9 g/kW h。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Dielectric-Boosted Gliding Arc Discharge for N2 Fixation into NOx

Dielectric-Boosted Gliding Arc Discharge for N2 Fixation into NOx

Dielectric-Boosted Gliding Arc Discharge for N2 Fixation into NOx

Plasma nitrogen fixation technology is of great significance in solving the problem of nitrogen fertilizer resource shortage, saving energy and reducing carbon emission, promoting sustainable development of agriculture and promoting resource recycling. To enhance the efficiency and treatment capacity of the two-dimensional, blade-type gliding arc nitrogen fixation reaction, a dielectric-boosted gliding arc discharge reactor with a 50-mm-diameter quartz dielectric (DBGADΦ50) was used to conduct N2 fixation into NOx. The impact of reactor parameters and gas parameters on the nitrogen fixation reaction was systematically investigated in this study. The findings revealed that the DBGADΦ50 significantly improved the nitrogen fixation effect. At a specific input energy of 2.7 kJ/L, the concentration of NOx generated by the dielectric-boosted gliding arc air discharge was 1.12 times that of the conventional gliding arc discharge (GAD). By utilizing the DBGADΦ50 reactor, the energy efficiency of 6.83 g/kW h was achieved at a gas flow rate of 5.6 L/min. Appropriately increasing O2 concentration favors the production of NOx. In the DBGADΦ50, the NOx concentration was 1.33 times higher than that in the air atmosphere when the added O2 volume fraction reached 30%. Performance can be further enhanced by adding TiO2 catalyst particles to the surface of the quartz dielectric to form a catalyst layer approximately 5 mm thick. At an O2 concentration of 30%, the DBGADΦ50 reactor loaded with TiO2 increased NOx concentration by 26% and energy efficiency by 49%, respectively, resulting in an efficiency of 14.9 g/kW h compared to the case without catalyst.

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来源期刊
Plasma Chemistry and Plasma Processing
Plasma Chemistry and Plasma Processing 工程技术-工程:化工
CiteScore
5.90
自引率
8.30%
发文量
73
审稿时长
6-12 weeks
期刊介绍: Publishing original papers on fundamental and applied research in plasma chemistry and plasma processing, the scope of this journal includes processing plasmas ranging from non-thermal plasmas to thermal plasmas, and fundamental plasma studies as well as studies of specific plasma applications. Such applications include but are not limited to plasma catalysis, environmental processing including treatment of liquids and gases, biological applications of plasmas including plasma medicine and agriculture, surface modification and deposition, powder and nanostructure synthesis, energy applications including plasma combustion and reforming, resource recovery, coupling of plasmas and electrochemistry, and plasma etching. Studies of chemical kinetics in plasmas, and the interactions of plasmas with surfaces are also solicited. It is essential that submissions include substantial consideration of the role of the plasma, for example, the relevant plasma chemistry, plasma physics or plasma–surface interactions; manuscripts that consider solely the properties of materials or substances processed using a plasma are not within the journal’s scope.
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