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A Cascaded Discharge plasma—Adsorbent Technique for engine exhaust Treatment

Plasma Science and Technology 2003年第3期5卷 1825-1833页

作者： B.S.Rajanikanth A.D.Srinivasan B.AryaNandiny DeptofHighVoltageengineering IndianInstituteofScienceBangalore560012India

A cascaded system of electrical discharges (non-thermal plasma) andadsorption process was investigated for the removal of oxides of Nitrogen (NO_x) and totalhydrocarbons (THC) from an actual diesel engine exhaust. The non-thermal plasma and adsorptionprocesses were separately studied first and then the cascaded process was studied. In this study,different types of adsorbents were used. The NO_x removal efficiency was higher withplasma-associated adsorption (cascaded) process compared to the individual processes and the removalefficiency was found almost invariant in time. When associated by plasma, among the adsorbentsstudied, activated charcoal and MS-13X were more effective for NO_x and THC removal *** experiments were conducted at no load and at 50 % load conditions. The plasma reactor was keptat room temperature throughout the experiment, while the temperature of the adsorbent reactor wasvaried. A relative comparison of adsorbents was discussed at the end.

关键词： discharge plasma engine exhaust adsorbent non-thermal plasma

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Discharge Plasma Assisted Adsorbents for exhaust Treatment: A Comparative Analysis on Enhancing NO_x Removal

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Plasma Science and Technology 2008年第3期10卷 307-312页

作者： B.S.RAJANIKANTH Dipanwita SINHA P.EMMANUEL Department of High Voltage engineering Indian Institute of Science Bangalore 560012 India

An analysis has been made on the discharge plasma coupled with an adsorbent system for NOx removal. The cascaded plasma-adsorbent system may be perceived as a better alternative for the existing adsorbent-based abatement system in the industry. In this study the exhaust is sourced from a diesel generator set. It was observed that better NO removal in a plasma reactor can be made possible by achieving higher average fields and subsequent NO2 removal can be improved using an adsorbent system connected in cascade with the plasma system. The paper describes various findings pertaining to these comparative analyses.

关键词： NOx removal engine exhaust discharge plasma plasma-adsorbent non- thermal plasma

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Achieving Better NO_x Removal in Discharge Plasma Reactor by Field Enhancement

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Plasma Science and Technology 2008年第2期10卷 198-202页

作者： B.S.RAJANIKANTH Dipanwita SINHA High Voltage Laboratory Deptartment of Electrical Engineering Indian Institute of Science Bangalore 560012 India

Application of plasma chemistry for gas cleaning is gaining prominence in recent years, mainly from an energy efficiency point of view. In this paper we conducted a comparative study of NO/NOx removal using two different types of dielectric barrier discharge electrodes, wire- cylinder reactor, pipe-cylinder reactor. Investigations were first carried out with synthetic gases to obtain the baseline information on the NO/NOx removal with respect to the two geometries studied. Further, experiments were carried out with raw diesel exhaust under loaded condition. A high NOx removal efficiency of 90% was observed for the pipe-cylinder reactor as compared to that of 53.4% for the wire-cylinder reactor. Furthermore, for the same energy consumed per NO molecule （about 73 eV/NO molecule）, the removal efficiency increased from 67% for the wire- cylinder to about 98% for the pipe-cylinder which was quite appreciable.

关键词： NOx removal engine exhaust plasma treatment barrier discharge electrodes

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