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- W2000320899 abstract "Abstract The NO oxidation reaction kinetics over a number of zeolite structures were investigated at temperatures above 423 K using plug-flow microreactors and in situ FTIR spectroscopy. Fast catalytic NO oxidation rates (up to 1000×) are observed over H- and Na-exchanged zeolite frameworks (BEA, MFI, and CHA) at temperatures above 423 K with respect to the gas-phase reaction. NO oxidation rates increase with temperature over H- and Na-zeolites, while siliceous zeolites display little activity. Activation energies scale in the order of CHA −1 ), and application of transition state theory shows that the formation of the activated complex is an enthalpically controlled process that benefits from smaller zeolite pore size. In all samples, rates are proportional to NO and O 2 concentrations, in contrast to low-temperature catalytic rates Loiland et al. [33], which are second order in NO and first order in O 2 . This difference indicates that a new reaction mechanism is operative above 423 K. In-situ FTIR studies reveal that NO + coordinated at framework sites in the zeolite pores (Si O − (NO + ) Al) plays a direct role in the catalysis, and they also reveal that the NO oxidation rate is proportional to the amount of NO + present in the sample. Furthermore, it is found that NO + is in equilibrium with gas-phase NO and that desorption of NO + (as NO) yields an oxidized acid site (Si O Al). No evidence of NO + formation is observed over the siliceous zeolite samples. A working model of the reaction mechanism for the high-temperature NO oxidation reaction is proposed for acidic zeolites that is consistent with the observed form of the rate equation and the observed NO + reaction intermediate." @default.
- W2000320899 created "2016-06-24" @default.
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- W2000320899 date "2015-05-01" @default.
- W2000320899 modified "2023-10-11" @default.
- W2000320899 title "Oxidation of zeolite acid sites in NO/O2 mixtures and the catalytic properties of the new site in NO oxidation" @default.
- W2000320899 cites W1665500347 @default.
- W2000320899 cites W1963885431 @default.
- W2000320899 cites W1968703286 @default.
- W2000320899 cites W1968733438 @default.
- W2000320899 cites W1970568856 @default.
- W2000320899 cites W1974586052 @default.
- W2000320899 cites W1975208468 @default.
- W2000320899 cites W1975511973 @default.
- W2000320899 cites W1980953390 @default.
- W2000320899 cites W1989670354 @default.
- W2000320899 cites W1992546366 @default.
- W2000320899 cites W1993634400 @default.
- W2000320899 cites W1995393404 @default.
- W2000320899 cites W1998490128 @default.
- W2000320899 cites W2002747454 @default.
- W2000320899 cites W2003231136 @default.
- W2000320899 cites W2005271134 @default.
- W2000320899 cites W2009665744 @default.
- W2000320899 cites W2010552065 @default.
- W2000320899 cites W2012039905 @default.
- W2000320899 cites W2013957307 @default.
- W2000320899 cites W2015390820 @default.
- W2000320899 cites W2016062561 @default.
- W2000320899 cites W2016582719 @default.
- W2000320899 cites W2021346141 @default.
- W2000320899 cites W2026867814 @default.
- W2000320899 cites W2028374851 @default.
- W2000320899 cites W2035705906 @default.
- W2000320899 cites W2037276741 @default.
- W2000320899 cites W2039564029 @default.
- W2000320899 cites W2039699762 @default.
- W2000320899 cites W2042183206 @default.
- W2000320899 cites W2042525693 @default.
- W2000320899 cites W2045576683 @default.
- W2000320899 cites W2049411291 @default.
- W2000320899 cites W2052825984 @default.
- W2000320899 cites W2053577819 @default.
- W2000320899 cites W2056626830 @default.
- W2000320899 cites W2057365481 @default.
- W2000320899 cites W2061012896 @default.
- W2000320899 cites W2062171216 @default.
- W2000320899 cites W2063063169 @default.
- W2000320899 cites W2063586944 @default.
- W2000320899 cites W2063630714 @default.
- W2000320899 cites W2064037434 @default.
- W2000320899 cites W2067153093 @default.
- W2000320899 cites W2068272848 @default.
- W2000320899 cites W2070781478 @default.
- W2000320899 cites W2072867121 @default.
- W2000320899 cites W2075046514 @default.
- W2000320899 cites W2075719948 @default.
- W2000320899 cites W2075837742 @default.
- W2000320899 cites W2076833660 @default.
- W2000320899 cites W2077366207 @default.
- W2000320899 cites W2079022793 @default.
- W2000320899 cites W2085242351 @default.
- W2000320899 cites W2085248249 @default.
- W2000320899 cites W2086456472 @default.
- W2000320899 cites W2087758007 @default.
- W2000320899 cites W2088735891 @default.
- W2000320899 cites W2092812582 @default.
- W2000320899 cites W2093061442 @default.
- W2000320899 cites W2094359347 @default.
- W2000320899 cites W2096306046 @default.
- W2000320899 cites W2119341942 @default.
- W2000320899 cites W2135157414 @default.
- W2000320899 cites W2315857961 @default.
- W2000320899 cites W2320178227 @default.
- W2000320899 cites W2330752659 @default.
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- W2000320899 cites W2461230163 @default.
- W2000320899 cites W299670270 @default.
- W2000320899 cites W40026226 @default.
- W2000320899 cites W4253028495 @default.
- W2000320899 cites W55678189 @default.
- W2000320899 doi "https://doi.org/10.1016/j.jcat.2015.02.009" @default.
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