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首页> 外文期刊>Plasma Sources Science & Technology >Conversion of volatile organic compounds in a twin surface dielectric barrier discharge
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Conversion of volatile organic compounds in a twin surface dielectric barrier discharge

机译：在双面介电阻挡放电中转化挥发性有机化合物

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摘要

A voltage and power controlled surface dielectric barrier discharge for the removal of volatile organic compounds (VOCs) from gas streams is studied by means of current–voltage measurements, flame ionization detectors, and gas chromatography–mass spectrometry (GC–MS). The discharge is generated in a defined synthetic air gas stream at atmospheric pressure by application of a damped sinusoidal voltage waveform resulting from a resonant circuit. Multiple organic compounds, namely n-butane, butanol, isobutanol, ethyl acetate, diethyl ether, and butoxyethanol, are tested at concentrations of 50, 100, 200, and 400 ppm (parts per million), as well as peak-to-peak voltages of 8 to 13 kV_(pp) and pulse repetition frequencies of 250 to 4000 Hz. The dissipated power within the system is calculated utilizing the measured voltage and current waveforms. The conversion and absolute degradation of the VOCs are determined by flame ionization detectors. An increasing concentration of VOCs is found to increase the dissipated power marginally, suggesting a higher conductivity and higher electron densities in the plasma. Of the applied VOCs, n-butane is found to be the most resistant to the plasma treatment, while higher concentrations consistently result in a lower conversion and a higher absolute degradation across all tested compounds. Corresponding amounts of converted molecules per expended joule are given as a comparable parameter by weighting the absolute degradation with the dissipated power. Finally, specific reaction products are determined by online GC–MS, further confirming carbon dioxide (CO_2) as a major reaction product, alongside a variety of less prevalent side products, depending on the structure of the original compound. The findings of this study are intended to promote the development of energy efficient processes for the purification of gas streams in both, industry and consumer market. Potential applications of the presented technique could be found in car pa
机译：通过电流-电压测量、火焰离子化检测器和气相色谱-质谱（GC-MS）研究了用于去除气流中挥发性有机化合物（VOCs）的电压和功率控制表面介质阻挡放电。放电是在大气压力下，通过施加由谐振电路产生的阻尼正弦电压波形，在规定的合成空气气流中产生的。多种有机化合物，即正丁烷、丁醇、异丁醇、乙酸乙酯、乙醚和丁氧基乙醇，在50、100、200和400 ppm（百万分之几）的浓度下进行测试，峰间电压为8至13千伏（pp），脉冲重复频率为250至4000赫兹。利用测量的电压和电流波形计算系统内的耗散功率。VOCs的转化率和绝对降解率由火焰离子化检测器确定。研究发现，随着VOCs浓度的增加，耗散功率略有增加，表明等离子体中的电导率和电子密度更高。在所使用的挥发性有机化合物中，正丁烷对等离子体处理的耐受性最强，而浓度越高，所有测试化合物的转化率越低，绝对降解率越高。通过用耗散功率加权绝对降解，给出了每消耗焦耳相应的转化分子量作为可比参数。最后，通过在线GC-MS测定特定的反应产物，进一步确认二氧化碳（CO_2）是主要反应产物，以及各种不太常见的副产物，具体取决于原始化合物的结构。本研究的结果旨在促进工业和消费市场中用于净化气流的节能工艺的发展。该技术的潜在应用可在汽车pa中找到

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  • 来源
    《Plasma Sources Science & Technology》 |2020年第11期|共15页
  • 作者

    Lars Schücke; Jan-Luca Gembus; Niklas Peters; Friederike Kogelheide; Ryan T Nguyen-Smith; Andrew R Gibson; Julian Schulze; Martin Muhler; Peter Awakowicz;

  • 作者单位

    Institute of Electrical Engineering and Plasma Technology Faculty of Electrical Engineering and Information Sciences Ruhr University Bochum Germany;

    Institute of Electrical Engineering and Plasma Technology Faculty of Electrical Engineering and Information Sciences Ruhr University Bochum Germany;

    Laboratory of Industrial Chemistry Faculty of Chemistry and Biochemistry Ruhr University Bochum Germany;

    Institute of Electrical Engineering and Plasma Technology Faculty of Electrical Engineering and Information Sciences Ruhr University Bochum Germany;

    Institute of Electrical Engineering and Plasma Technology Faculty of Electrical Engineering and Information Sciences Ruhr University Bochum Germany;

    Institute of Electrical Engineering and Plasma Technology Faculty of Electrical Engineering and Information Sciences Ruhr University Bochum Germany;

    Institute of Electrical Engineering and Plasma Technology Faculty of Electrical Engineering and Information Sciences Ruhr University Bochum Germany;

    Laboratory of Industrial Chemistry Faculty of Chemistry and Biochemistry Ruhr University Bochum Germany;

    Institute of Electrical Engineering and Plasma Technology Faculty of Electrical Engineering and Information Sciences Ruhr University Bochum Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 等离子体物理学;
  • 关键词

    dielectric barrier discharge; volatile organic compounds; dissipated power; conversion; flame ionization detector; gas chromatography–mass spectrometry;

    机译：介质屏障放电;挥发性有机化合物;耗散功率;转化;火焰电离检测器;气相色谱 - 质谱;

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