The AgCl/Al2O3 catalyst has potential for use in the selective catalytic reduction（SCR） of NOx.A compound hydrocarbon,following oxygenation is used as a type of reducing agent.In this experiment,the AgCl/Al2O3 catal...The AgCl/Al2O3 catalyst has potential for use in the selective catalytic reduction（SCR） of NOx.A compound hydrocarbon,following oxygenation is used as a type of reducing agent.In this experiment,the AgCl/Al2O3 catalyst was produced by four different methods,and the differences among their reduction catalysis of NOx were compared.Ethanol was used as a type of reducing agent.X-ray diffraction analysis was performed to study the crystalline structure and scanning electron microscope and transmission electron microscope（TEM） were applied to determine the microindentation.The results indicated that,in the range of 350-400℃,there was no significant difference on the NOx reduction rate;however,there was dispersion at high and low temperature ranges.The size of the AgCl particles was about 20-100 nm.展开更多
A multielectrolytic modified carbon electrode （MEMCE） was fabricated by the electrolytic-oxidation/reduction processes. First, the functional groups containing nitrogen atoms such as amino group were introduced by t...A multielectrolytic modified carbon electrode （MEMCE） was fabricated by the electrolytic-oxidation/reduction processes. First, the functional groups containing nitrogen atoms such as amino group were introduced by the electrode oxidation of carbon felt electrode in an ammonium carbamate aqueous solution, and next, this electrode was electroreduced in sulfuric acid. The redox waves between hydrogen ion and hydrogen molecule at highly positive potential range appeared in the cyclic voltammogram obtained by MEMCE. A coulometric cell using MEMCE with a catalytic activity of electrooxidation of hydrogen molecule was constructed and was used for the measurement of dissolved hydrogen. The typical current vs. time curve was obtained by the repetitive measurement of the dissolved hydrogen. These curves indicated that the measurement of dissolved hydrogen was finished completely in a very short time （ca. 10 sec）. A linear relationship was obtained between the electrical charge needed for the electrooxidation process of hydrogen molecule and dissolved hydrogen concentration. This indicates that the developed coulometric method can be used for the determination of the dissolved hydrogen concentration.展开更多
基金supported by the Open Research Center of Saitama Institute of Technology
文摘The AgCl/Al2O3 catalyst has potential for use in the selective catalytic reduction（SCR） of NOx.A compound hydrocarbon,following oxygenation is used as a type of reducing agent.In this experiment,the AgCl/Al2O3 catalyst was produced by four different methods,and the differences among their reduction catalysis of NOx were compared.Ethanol was used as a type of reducing agent.X-ray diffraction analysis was performed to study the crystalline structure and scanning electron microscope and transmission electron microscope（TEM） were applied to determine the microindentation.The results indicated that,in the range of 350-400℃,there was no significant difference on the NOx reduction rate;however,there was dispersion at high and low temperature ranges.The size of the AgCl particles was about 20-100 nm.
文摘A multielectrolytic modified carbon electrode （MEMCE） was fabricated by the electrolytic-oxidation/reduction processes. First, the functional groups containing nitrogen atoms such as amino group were introduced by the electrode oxidation of carbon felt electrode in an ammonium carbamate aqueous solution, and next, this electrode was electroreduced in sulfuric acid. The redox waves between hydrogen ion and hydrogen molecule at highly positive potential range appeared in the cyclic voltammogram obtained by MEMCE. A coulometric cell using MEMCE with a catalytic activity of electrooxidation of hydrogen molecule was constructed and was used for the measurement of dissolved hydrogen. The typical current vs. time curve was obtained by the repetitive measurement of the dissolved hydrogen. These curves indicated that the measurement of dissolved hydrogen was finished completely in a very short time （ca. 10 sec）. A linear relationship was obtained between the electrical charge needed for the electrooxidation process of hydrogen molecule and dissolved hydrogen concentration. This indicates that the developed coulometric method can be used for the determination of the dissolved hydrogen concentration.
