NO/sub x/ removal from engine exhaust gas using multipoints DBD and pulse streamer discharges with SOS pulse generator

K. Takaki, T. Sasaki, S. Kato, S. Mukaigawa, T. Fujiwara
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引用次数: 2

Abstract

NO/sub x/ removal from a diesel engine exhaust and simulated gases was carried out using two different nonthermal plasma reactors. One is multipoints dielectric barrier discharge (DBD) reactor, the other is pulse streamer discharge (PSD) reactor. In the former reactor, the 2 mm thickness Pyrex glass plate is used as the dielectric barrier. The DBD reactor is driven by IGBT pulse modulator which can supply the 10 kV pulse voltage to the reactor with repetition rate of 2.5 kpps. The co-axial cylinder type discharge chamber is used as the PSD reactor which is driven by the pulse power generator with semiconductor opening switches (SOS). The SOS pulse generator can supply both polarity of 30 kV pulse with 300 pps repetition rate. The DBD reactor energy cost for NO removal from simulated gas (N/sub 2/:O/sub 2/=9:1, initial NO concentration = 200 ppm) is obtained to 12 g/kWh at 65% removal in 5 l/min. gas flow rate. The energy cost of the PSD reactor is almost 12 g/kWh at 25% NO removal efficiency. The DBD reactor was applied to 20 kVA diesel engine generator exhaust gas treatment. The contained NO/sub x/ (NO+NO/sub 2/) is abated from 70 to 40 ppm at no-load to the generator, and from 340 to 300 ppm. at 50 A load. The energy cost for the NO/sub x/ removal is obtained to 32 g/kWh.
使用多点DBD和带有SOS脉冲发生器的脉冲拖缆排放从发动机废气中去除NO/sub / x
采用两个不同的非热等离子体反应器对柴油机尾气和模拟气体中的NO/sub x/进行了去除。一种是多点介质阻挡放电(DBD)电抗器,另一种是脉冲流放电(PSD)电抗器。在原反应器中,采用2mm厚度的耐热玻璃板作为介质屏障。DBD电抗器由IGBT脉冲调制器驱动,可为电抗器提供10 kV脉冲电压,重复频率为2.5 kpps。采用同轴圆柱式放电室作为PSD电抗器,由带半导体开口开关(SOS)的脉冲功率发生器驱动。SOS脉冲发生器可提供30千伏的双极性脉冲,重复频率为300 pps。DBD反应器在模拟气体(N/sub 2/:O/sub 2/=9:1,初始NO浓度= 200 ppm)中去除NO的能量成本为12 g/kWh,去除率为65%,去除率为5 l/min。气体流速。在25%的NO去除率下,PSD反应器的能源成本几乎为12 g/kWh。将DBD反应器应用于20kva柴油机发电机组废气处理。所含的NO/sub x/ (NO+NO/sub 2/)在发电机空载时从70 ppm减少到40 ppm,从340 ppm减少到300 ppm。负载50a。NO/ subx /脱除的能源成本为32g /kWh。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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