A study of (LaSr)MO3(M=Co, Mn) as the cathode material of electrochemical double cell for the decomposition of sulfur dioxide and nitrogen oxides

• Main Authors: Shih, Chih, 施奇
• Other Authors: Huang, Ta-Jen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/34376384984365232452

碩士 === 國立清華大學 === 化學工程學系 === 102 === Since the transportation as well as the factory boiler has been the main emission sources of nitrogen oxides(NOx) and sulfur dioxide (SO2), governments around the world adopt strict standards because of serious cases in air pollution. In today's processing technology, large amounts of reducing agent must be used, not only consumes the massive equipment cost but also has the secondary pollution concerns. The development of Electrochemical double cell(EDC) in our lab using Electromotive force(EMF) between cathode and anode to make NOx and SO2 decomposing on the catalyst surfaces in order to achieve emission reduction. Perovskite structure (La0.8Sr0.2) 0.95MnO3-δ (LSM) and La0.6Sr0.4CoO3-δ (LSC) with oxygen ion conductivity material Ce0.9Gd0.1O1.95 (GDC) as EDC's cathode material, nitrogen, oxygen, nitric oxide, sulfur dioxide, carbon dioxide and water as a component gases to simulate car exhaust or industrial emissions. By modulating the concentration of nitrogen oxides and sulfur dioxide between, we can learn more about these two kinds of materials for the catalytic activity of the reactants. In this study, we use LSC-GDC and LSM-GDC as the cathode of EDC,and the result show that LSC has a better activity on NOx while LSM has a better performance than LSC on SO2.