NO/sub x/ concentration using adsorption and nonthermal plasma desorption
NO/sub x/ concentration using adsorption and nonthermal plasma desorption
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NO/sub x/ 使用吸附和非热等离子体解吸的浓度
DOI：
10.1109/tia.2002.802916
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Kuwahara
中科院分区：
文献类型：
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作者：
M. Okubo;T. Kuroki;H. Yamada;Keiichiro Yoshida;T. Kuwahara
空气污染物和温室气体排放通常具有高气体流速和低浓度（以ppm ~ %为单位，1% = 10,000 ppm）。直接处理高流量低浓度废气所需的庞大设备导致高能耗和过高的运营成本。因此，本研究的目的是将高流量低浓度废气转化为低流量高浓度气体。这是通过在非热等离子体（NTP）反应器内施加大气等离子体来解吸吸附剂中的气体来实现的。本文主要通过该方法对二氧化碳（CO2）浓度（冷凝）进行研究。吸附剂由球形~ 2mm直径的沸石分子筛球团组成。等离子体解吸是通过向等离子体反应器施加纳秒级高压脉冲（峰值电压~ 35 kV，脉冲频率= 140-350 Hz，脉冲宽度~ 600 ns）来实现的。气体流速为4l /min， CO2浓度为2.75%，O2浓度为18%，H2O浓度为1%，N2浓度为平衡。结果表明，重复吸附和NTP解吸过程比热解吸过程更有效、更快地解吸CO2。此外，对于相同的电功率，在相同的电功率下，NTP解吸过程中的峰值浓度（通常为13%）高于热过程。这些结果表明，NTP将CO2有效解离为CO，可用于生产燃烧燃料，是可能的。
Air-pollutant and greenhouse gas emissions typically have high gas flow rates and low concentrations (in ppm ∼ % levels, 1% = 10 000 ppm). The bulky equipment required for direct treatment of high-flow-rate low-concentration exhaust gases result in high-energy consumption and prohibitive operating costs. As such, the objective of this study is to convert high-flow-rate low-concentration exhaust gases into low-flow-rate high-concentration gases. This is achieved by desorbing the gas from an adsorbent by applying an atmospheric plasma inside a nonthermal plasma (NTP) reactor. This paper focuses on carbon dioxide (CO2) concentration (condensation) via this method. The adsorbent consists of spherical ∼2-mm-diameter molecular-sieve pellets of zeolite. Plasma desorption is performed by applying nanosecond high-voltage pulses (peak voltage ∼35 kV, pulse frequency = 140–350 Hz, and pulse width ∼600 ns) to the plasma reactor. A gas flow rate of 4 L/min is used and the concentrations of CO2, O2, H2O, and N2 gases are 2.75%, 18%, 1%, and the balance, respectively. The results reveal that CO2 can be desorbed effectively and more rapidly in a repeated adsorption and NTP desorption process than during the thermal process. Moreover, for the same electric power, the peak concentrations (typically 13%) are higher in the NTP desorption process than in the thermal process at equal electric power. These results indicate that the efficient NTP dissociation of CO2 to CO, which can be utilized in the production of combustion fuels, is possible.