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- W2009016620 abstract "T heH 3-SCR characteristics of NOX over a V-based catalyst are experimentally examined over a wide range of operating conditions, i.e., 170-590°C and 30,000-50,000 h -1 , with a simulated diesel exhaust containing NH3, NO, NO2, O2, H2O, and N2. The influences of the space velocity and oxygen concentration on the standard-SCR reaction are analyzed, and it is shown that the low space velocity and high oxygen concentration promote the SCR activity by ammonia. The best deNOX efficiency is obtained with a NO2/NOX ratio of 0.5 because of an enhanced chemical activity induced by the fast-SCR reaction, while at the NO2/NOX ratios above 0.5 the deNOX activity decreases due to the slow-SCR reaction. The oxidation of ammonia begins to take place at about 300°C and the reaction products, such as N2, NO, NO2, N2O, and H2O, are produced by the undesirable oxidation reactions of ammonia, particularly at high temperatures above 450°C. Also, NO2 decomposes to NO and O2 at temperatures above 240°C. Therefore, NO2 decomposition and ammonia oxidation reactions deteriorate significantly the SCR catalytic activity at high temperatures." @default.
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- W2009016620 date "2012-01-01" @default.
- W2009016620 modified "2023-09-23" @default.
- W2009016620 title "An Experimental Study on the NH3-SCR of NOxover a Vanadium-based Catlayst" @default.
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- W2009016620 doi "https://doi.org/10.7467/ksae.2012.20.1.020" @default.
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