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 ga...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.展开更多
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 sources.In this work,an attempt ...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 sources.In 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/adsorbents.It 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/l.In the long run,this plasma-only based approach may be beneficial or a possible alternative for catalyst/adsorbent based NO_(x) treatments.The results have been discussed and a comparative analysis has been made with respect to individual plasma and ozone injection treatment.展开更多
文摘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.
文摘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 sources.In 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/adsorbents.It 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/l.In the long run,this plasma-only based approach may be beneficial or a possible alternative for catalyst/adsorbent based NO_(x) treatments.The results have been discussed and a comparative analysis has been made with respect to individual plasma and ozone injection treatment.
