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- W1964013658 abstract "The effects of coexisting H/sub 2/O, O/sub 2/, and SO/sub 2/ on the NO-NH/sub 3/ reaction over Cu(II) NaY were examined from a standpoint of practical application to NO removal processes. It is found that water vapor lowered the rate of NO reduction, and the effect was analyzed in terms of the adsorption of H/sub 2/O on Cu(II) ions in competition with NH/sub 3/ and NO. On the contrary, the coexistence of oxygen caused an excellent promoting effect especially at temperatures higher than 120/sup 0/C, where the catalytic rate had a negative temperature coefficient in the absence of oxygen. Moreover, in the reaction products, no N/sub 2/O was detected in contrast to the case in the absence of oxygen. It is proposed that the coexisting oxygen participates in the reoxidation of Cu(I) ions in the catalytic cycle, which is otherwise to be completed in association with a disproportionation reaction of NO. Sulfur dioxide showed an inhibition effect. In the presence of SO/sub 2/ (100 ppM), the catalytic activity declined rapidly during reaction to a stationary value. The stationary rate of NO reduction increased with a rise in temperature from 100 to 260/sup 0/C. X-ray analysis revealed that a part ofmore » zeolite framework of the deactivated catalysts was destroyed due to the formation of sulfates. 7 figures, 1 table.« less" @default.
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- W1964013658 date "1979-10-15" @default.
- W1964013658 modified "2023-10-17" @default.
- W1964013658 title "Effects of coexisting gases on the catalytic reduction of NO with NH over Cu(II) NaY" @default.
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- W1964013658 doi "https://doi.org/10.1016/s0021-9517(79)80001-9" @default.
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