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NO_(X) abatement from filtered diesel engine exhaust using battery-powered high-voltage pulse power supply

High Voltage 2017年第2期2卷 69-77页

作者： sankarsan mohapatro Srikanth Allamsetty DEI Laboratory School of Electrical SciencesIndian Institute of Technology BhubaneswarJatniIndia

The dielectric barrier discharge-based non-thermal plasma technique is one of the most prominent techniques which give peerless results in controlling the concentration of NO_(X).However,when it comes to the automobile diesel engine,availability of high-voltage pulse power supply is the major *** this study,battery-powered high-voltage pulse power supply for NO_(X) treatment has been *** types of electrodes:rod type and rod with helical spring type are studied for the treatment of *** plasma-adsorbent technique has also been used to enhance NO_(X) removal *** have been conducted with two different gas flow rates,i.e.4 l and 6 l/min at laboratory level and have got significant results toward removal of NO_(X).When the exhaust has been treated with plasma alone,the reactor with rod-type electrode has shown 85%NO_(X) removal efficiency at a specific energy(SE)of 283 J/l with a flow rate of 4 l/*** the plasma reactor is cascaded with the adsorbent reactor,both adsorbents:13x molecular sieve(MS13x)and activated alumina are able to remove 100%of NO_(X) with the proposed power supply at a lesser SE.

关键词： adsorbent filtered remove

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Study of Pulsed Plasma in a Crossed Flow Dielectric Barrier Discharge Reactor for Improvement of NO_x Removal in Raw Diesel Engine Exhaust

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Plasma Science and Technology 2011年第1期13卷 82-87页

作者： sankarsan mohapatro B.S.RAJANIKANTH High Voltage Lab Indian Institute of Science

Improved performance of plasma in raw engine exhaust treatment is reported. A new type of reactor referred to as of cross-flow dielectric barrier discharge （DBD） was used, in which the gas flow is perpendicular to the corona electrode. In raw exhaust environment, the cross-flow （radial-flow） reactor exhibits a superior performance with regard to NOx removal when compared to that with axial flow of gas. Experiments were conducted at different flow rates ranging from 2 L/min to 25 L/min. The plasma assisted barrier discharge reactor has shown encouraging results in NOx removal at high flow rates.

关键词： electric discharges NOx removal, non-thermal plasma, raw diesel engine exhaust

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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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Late Time Behavior of the Cosmological Model in Modified Theory of Gravity

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Journal of High Energy Physics, Gravitation and Cosmology 2022年第4期8卷 1019-1031页

作者： sankarsan Tarai Jagadish Kumar Centre of High Energy and Condensed Matter Physics Department of Physics Utkal University Vani Vihar Bhubaneswar India

We report a viable exponential gravity model for the accelerated expansion of the universe in Bianchi VIh space-time. By considering the estimated physical parameters, the cosmological models are constructed and analyzed in detail. We found that the state parameter in both the models increases to a higher negative range in an early epoch of the phantom domain and it goes to the positive domain at a late phase of the evolution. The effective cosmological constant remains in a positive domain for both models, which is a good sign of accelerating expansion of the universe.

关键词： f (R T) Gravity Bianchi Type VIh Perfect Fluid

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