A plasma-assisted catalytic reactor was used to remove nitrogen oxides (NOx)from diesel engine exhaust operated under different load conditions. Initial studies were focused onplasma reactor (a dielectric barrier disc...A plasma-assisted catalytic reactor was used to remove nitrogen oxides (NOx)from diesel engine exhaust operated under different load conditions. Initial studies were focused onplasma reactor (a dielectric barrier discharge reactor) treatment of diesel exhaust at varioustemperatures. The nitric oxide (NO) removal efficiency was lowered when high temperature exhaust wastreated using plasma reactor. Also, NO removal efficiency decreased when 45% load exhaust wastreated. Studies were then made with plasma reactor combined with a catalytic reactor consisting ofa selective catalytic reduction (SCR) catalyst, V_2O_5/TiO_2. Ammonia was used as a reducing agentfor SCR process in a ratio of 1:1 to NOx. The studies were focused on temperatures of the SCRcatalytic reactor below 200℃. The plasma-assisted catalytic reactor was operated well to remove NOxunder no-load and load conditions. For an energy input of 96 J/l, the NOx removal efficienciesobtained under no-load and load conditions were 90% and 72% respectively at an exhaust temperatureof 100 ℃.展开更多
Nitrogen monoxide(NO) emitted from automobile exhaust and other industrial sources contributes largely to a variety of environmental problems, such as the formation of acid rain and photochemical smog Therefore, the c...Nitrogen monoxide(NO) emitted from automobile exhaust and other industrial sources contributes largely to a variety of environmental problems, such as the formation of acid rain and photochemical smog Therefore, the catalytic reduction of NO has become one of the urgent environmental issues In the present study, a series of Au/Mn 2O 3/Al 2O 3 catalysts, with different Mn 2O 3 loadings, were prepared by deposition precipitation The crystallite size of Au before and after reaction was characterized by XRD The activity of catalysts in the selective catalytic reduction of NO using propane in the presence of oxygen was evaluated It is found that the catalytic activity of Au/Mn 2O 3/Al 2O 3 is higher than that of Au/Al 2O 3 and Cu ZSM 5 at feed gas(0 6%NO+1 2%C 3H 8+5%O 2+He) and GHSV 5?000?h展开更多
文摘A plasma-assisted catalytic reactor was used to remove nitrogen oxides (NOx)from diesel engine exhaust operated under different load conditions. Initial studies were focused onplasma reactor (a dielectric barrier discharge reactor) treatment of diesel exhaust at varioustemperatures. The nitric oxide (NO) removal efficiency was lowered when high temperature exhaust wastreated using plasma reactor. Also, NO removal efficiency decreased when 45% load exhaust wastreated. Studies were then made with plasma reactor combined with a catalytic reactor consisting ofa selective catalytic reduction (SCR) catalyst, V_2O_5/TiO_2. Ammonia was used as a reducing agentfor SCR process in a ratio of 1:1 to NOx. The studies were focused on temperatures of the SCRcatalytic reactor below 200℃. The plasma-assisted catalytic reactor was operated well to remove NOxunder no-load and load conditions. For an energy input of 96 J/l, the NOx removal efficienciesobtained under no-load and load conditions were 90% and 72% respectively at an exhaust temperatureof 100 ℃.
文摘Nitrogen monoxide(NO) emitted from automobile exhaust and other industrial sources contributes largely to a variety of environmental problems, such as the formation of acid rain and photochemical smog Therefore, the catalytic reduction of NO has become one of the urgent environmental issues In the present study, a series of Au/Mn 2O 3/Al 2O 3 catalysts, with different Mn 2O 3 loadings, were prepared by deposition precipitation The crystallite size of Au before and after reaction was characterized by XRD The activity of catalysts in the selective catalytic reduction of NO using propane in the presence of oxygen was evaluated It is found that the catalytic activity of Au/Mn 2O 3/Al 2O 3 is higher than that of Au/Al 2O 3 and Cu ZSM 5 at feed gas(0 6%NO+1 2%C 3H 8+5%O 2+He) and GHSV 5?000?h
