Study of adding Ag in La0.6Sr0.4Co0.95Cu0.05O3 as cathode material of electrochemical-catalytic cell on decomposition of nitric oxide in simulated exhaust
| Autor: | Yu, Chia-Chi, 游家棋 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 Diesel engine is a kind of lean-burn engines. Lean-burn engine can improve the efficiency of fuel using. Processing technology for nitric oxide should be more efforts to find new ways to solve this problem. The study of new technology is electrochemical-catalytic cells(ECC) that can used in low temperature. Inlet lean-burn engines exhaust gas can effective let nitric oxide transfer to nitrogen and oxides. And let not complete combustion of hydrocarbon transfer to carbon dioxide and water. At ECC anode site inlet reducing gas which is hydrogen. Because of the ECC doesn’t generate power, the hydrogen will not be reduced. At ECC cathode site inlet exhaust gas, analysis the outlet gas which including NOX, O2, CO2, H2O and SO2 via reaction of ECC cathode. Study different the amount of NOX, CO2 and H2O inlet ECC that can be how much electro-motive force(EMF) is. EMF will improve the NOX conversion. At different temperature inlet propane and propene. The experiment show that NOX conversion increased with increasing oxygen concentration. In the catalytic site inleting H2O will decay the NOX conversion,but doesn’t occur in ECC. In low NOX concentration, the rate determine step(R.D.S.) is Nads diffusion. In high NOX concentration, the R.D.S. is rate equation. The NOX conversion increased with increasing NOX concentration. The new electrochemical-catalytic cell is zirconia tube that the structure more hard then previously ECC. So it can free make thermal circle. At different NOX concentration, the NOX conversion is V curve with NOX concentration. The EMF and N2 yield increased with O2 concentration increasing. The different gas velocity at ECC cathode,the high gas velocity shows the high N2 formation rate;the low gas velocity shows the high NO conversion. And the high NOX concentration, the EMF increased with the temperature decreasing. At the anode site coking, at 100oC use the 1%CO coking 20 min that shows the high NOX conversion. The cause is that the coking carbon effectively increased the triple phase boundary(TPB). |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|