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Plasma cascaded solid wastes for possible adsorption of NO_(2)in diesel exhaust

Waste Disposal and Sustainable Energy 2023年第3期5卷 383-393页

作者： Apoorva Sahu Shivani Mishra Preeti Jain Bangalore S.Rajanikanth Department of electrical Engineering Indian Institute of ScienceBangaloreIndia Department of electrical Engineering Jabalpur Engineering CollegeJabalpurIndia

Extensive use of fossil fuel has led to an increase in solid and gaseous particulates in the environment,which in turn necessitated newer,effective,and economical control strategies to abate pollutants,particularly gaseous pollutants.In the current research work,focus has been placed on utilizing industry wastes to adsorb nitrogen oxides present in diesel engine exhaust,which is pre-treated by plasma.Sampled exhaust from a 5 kW diesel generator is exposed to discharge plasma where the oxidation of nitric oxide to nitrogen dioxide occurs,which is then made to flow through another reactor filled with industry wastes drawn from agriculture,foundry,utility,marine industry,etc.,comprising mulberry waste,rice husk,wheat husk,areca nut husk,sugarcane bagasse,coffee husk,foundry sand,lignite ash,red mud,and oyster shells.While the adsorption of nitrogen dioxide was observed in all the wastes,reduction of nitric oxide was observed in metallic compound-based industry wastes.At about 184 J/L,specific energy plasma cascaded industrial waste red mud yielded 98%NO_(x)removal efficiency,and that with agriculture rice husk waste yielded 53%NOx removal.TiO_(2)/Fe_(2)O_(3)present in industry wastes might have exhibited photo-catalysis in visible light resulting in the possible reduction of NO.A new pathway for recycling the waste can be expected through nitrogen dioxide adsorption,and the results are further discussed with respect to plasma-alone and cascaded plasma adsorbent systems.

关键词： Industry waste electrical discharge Diesel exhaust Nitrogen oxide reduction Agriculture waste Plasma adsorption

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Plasma-Assisted Chemistry in High-Speed Flow

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Plasma Science and Technology 2007年第6期9卷 760-765页

作者： Sergey B.LEONOV Dmitry A.YARANTSEV Anatoly P.NAPARTOVICH Igor V.KOCHETOV Joint Institute for High Temperature Russian Academy of Science Izhorskaya str.13/19Moscow 125412Russia State

Fundamental problems related to the high-speed combustion are analyzed. The result of plasma-chemical modeling is presented as a motivation of experimental activity. Numerical simulations of the effect of uniform non-equilibrium discharge on the premixed hydrogen and ethylene-air mixture in supersonic flow demonstrate an advantage of such a technique over a heating. Experimental results on multi-electrode non-uniform discharge maintenance behind wallstep and in cavity of supersonic flow are presented. The model test on hydrogen and ethylene ignition is demonstrated at direct fuel injection to low-temperature high-speed airflow.

关键词： high-speed combustion electrical discharge nonequilibrium kinetics

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放电对变压器油特性的影响(英文)

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高电压技术 2011年第11期37卷 2793-2799页

作者： J.S.N'Cho I.Fofana T.Aka-Ngnui A.Beroual Ecole Centrale de Lyon AMPERE CNRS UMR 500536Avenue Guy de Collongue69134EcullyFrance Canada Research Chair on Insulating Liquids and Mixed Dielectrics for Electrotechnology(ISOLIME) Universite du Quebec d ChicoutimiQcCanada

Petroleum based oils,the so-called mineral oils,are used for impregnating solid insulations or filling products of very large number of electric materials:transformers,reactors,cables,bushings,circuit breakers,tap changers, etc.In these equipments,oil is exposed to electrical stress and may experience electrical discharges under certain circumstances.Since the electrical stress is unavoidable in power equipments,the ability of oil to resist decomposition under electrical stress is of great importance for the safety of these devices.electrical stress together with heat and moisture,in the presence of oxygen,oxidises the oil producing free radicals,acids and sludge that are deleterious to the transformer.In this paper,the effect of electrical discharges on oil properties is reported.The results indicate that quality of oil is considerably affected with increasing voltage stress.Comparing oil properties before and after voltage application allows assessing the outcome of random secondary chemical reactions between large oil born free radicals.

关键词： electrical discharge oil transformer dielectric dissipation factor(DDF) conductivity dissolved decay products turbidity interfacial tension total acid number water content

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