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Augmenting NO_(x)reduction in diesel exhaust by combined plasma/ozone injection technique:a laboratory investigation

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High Voltage 2018年第1期3卷 60-66页

作者： apeksha madhukar Bangalore S.Rajanikanth Electrical Department Indian Institute of Science BangaloreIndia

With the advent of non-thermal plasma technique for diesel exhaust treatment attention is being focused on reducing oxides of nitrogen(NO_(x))both from stationary as well as automobile *** this work,an attempt has been made to enhance NO_(x) reduction only by utilising a plasma/ozone injection approach without resorting to additional treatments based on catalysts/*** was observed that cascading ozone injection with discharge plasma enhances the reduction of NO_(x) as high as 95%for the specific energy of 123 J/*** the long run,this plasma-only based approach may be beneficial or a possible alternative for catalyst/adsorbent based NO_(x) *** results have been discussed and a comparative analysis has been made with respect to individual plasma and ozone injection treatment.

关键词： adsorbent stationary catalyst

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Nanosecond pulse discharge based nitrogen oxides treatment using different electrode configurations

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High Voltage 2017年第2期2卷 60-68页

作者： Sankarsan Mohapatro Srikanth Allamsetty apeksha madhukar Nikhil Kumar Sharma DEI Lab School of Electrical SciencesIndian Institute of Technology BhubaneswarBhubaneswarOdisha 751013India HV Lab Department of Electrical EngineeringIndian Institute of ScienceBangaloreKarnataka 560012India

Nowadays,the intensity of air pollution,due to the industries and automobiles,has been increasing *** oxides(NO_(X))are one of the most harmful pollutants,which are getting released from both automobile and stationary diesel *** essentially need to be removed from the exhaust using after treatment ***,the energy required to remove these pollutants is one of the major considerations in selecting the technology for pollutant removal from diesel engine exhaust.A study has been carried out on the non-thermal plasma-based NO_(X) removal technique using various combinations of power supply units and electrode *** different electrode configurations are tested,in which two are cylindrical electrodes with diameters 3 and 5 mm,and the other one is a square electrode with a diagonal of 5 mm.A comparison is made between the results with two different pulse power supply units,PS-I:high-voltage direct current test set based and PS-II:DC–DC converter *** square electrode with PS-Ⅱhas been found to be the optimal combination,which has removed 85%of NO_(X) from the exhaust at an energy density of 55.5 J/L,when the initial NO_(X) concentration in the exhaust is 388 ppm.

关键词： electrode removed treatment

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