Japan Developed an Electrochemical Reactor to Purify Nitrogen Oxides Without Using Catalysts

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The Japan Industrial Technology Research Institute has successfully developed an electrochemical reactor that efficiently decomposes and purifies nitrogen oxides (NOx) in diesel exhaust gas at low temperatures. The reactor forms a nanostructured electrode that can decompose nitrogen oxides in diesel exhaust gases with oxygen concentrations up to about 20% below 250°C. By applying a voltage to the electrodes, the nitrogen oxides are decomposed into nitrogen molecules and oxygen molecules without using a catalyst. The reactor also reduces the energy required for tail gas purification and helps improve fuel efficiency. The use of this reactor can establish a system that combines environmental protection and CO2 reduction, and will replace the existing diesel vehicle exhaust gas purification equipment.

In the future, Iso Research will further reduce the operating temperature, increase the integration of the reaction area, and evaluate the effects of durability and coexisting gases. The reactor is put into practical use, and it is intended to combine this technology with the previously developed high-sensitivity, high-speed response NOx. Sensors and technologies that can simultaneously purify nitrogen oxides (particulate carbon) combine to develop comprehensive electrochemical exhaust gas purification equipment.

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