Study of La0.6Sr0.4CoxCu1-xO3-δ and Ce0.9Gd0.1O1.95 Composite as Cathode of Electrochemical-Catalytic Cell on Decomposition of Nitric Oxide in Simulated Exhaust

• Main Authors: Wu, Pei-Chin, 吳佩瑾
• Other Authors: Huang, Ta-Jen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/30338812512834230329

碩士 === 國立清華大學 === 化學工程學系 === 100 === Although lean-burn engines can improve fuel utilization, there is a problem on the exhaust of nitrogen oxide (NOx). In order to solve this problem, this study used perovskite structure materials La0.6Sr0.4Co x Cu1-x (LSCCu) and Ce0.9Gd0.1O2-x (GDC) composite as cathode material for electrochemical-catalytic cell (ECC) on the decomposition of nitrogen oxides in simulation of exhausted gas. There are two types ECC in this study: button type ECC and tubular type ECC. This study have experiments on button type ECC to find the impact on different NOx concentration, gas flow rate and the influence of oxygen concentration to decomposition NOx when composite different ratio of GDC in cathode. The experiment was operating under 400oC. Tubular type ECC was experimented for understand anode gas flow or stagnant and different types of gases while NOx was decomposed. The operating temperature was 30oC. The simulation of lean-burn combustion engine exhausted gas was composed with NOx, oxygen, carbon dioxide, water vapor and sulfur dioxide. The results show that mixing GDC in the cathode material for the decomposition of NOx is useful, and with more oxygen in the simulated exhausted gas are also improve NOx decomposition. When the anode gas was H2 and flow rate is stagnant, it also improves NOx decomposition. This results are a considerable help for future development of ECC to remove lean-burn combustion engine exhaust emissions of nitrogen oxides.